vapor pressure of methanol in torr

is 94 torr at 20 C. 260 C 009 1.0points At 75 , the vapor pressure of water, methanol, diethylether and benzene are 289, 1126, 2680, and 644 torr, respectively. (C2H6O2 - molar mass =62.07 g/mol) Consider the equilibrium of methanol vapor and the liquid. Methanol and ethanol have similar structures and similar intermolecular forces, but differ in molecular size. Calculate the partial pressure of Ne in the mixture (in atm). {/eq}, {eq}\rm P_{C_2H_5OH} = x_{C_2H_5OH}P^o_{C_2H_5OH} \\ Calculate the vapor pressure of a solution of 1.48 m Al(NO3)3 at this temperature (assume 100% dissociation). Other uncategorized cookies are those that are being analyzed and have not been classified into a category as yet. National Library of Medicine. National Institutes of Health. Its vapor pressure at 20C is 58.96 kPa. Calculate mole fraction of A at which 2 liquids have equal partial pressure. Assume ideal behavior and calculate the partial pressures of ethanol and 1-propan, calculate the total vapour pressure of mixture of methanol(64g) and ethanol(92g) at 298K given that the pure vapour pressure of methanol is 90mmHg and ethanol is 45mmHg (C=12, H=1, O=16), A mixture of 0.2 moles of alcohol A and 0.5 moles of alcohol B has a total vapor pressure of 40 mmHg at 297 K. If the mixture obeys Raoult's law, find the vapor pressure of pure B at 297 K given that, The vapor pressure of ethanol is 100 mmHg at 34.9 degrees C. What is its vapor pressure at 65.5 degrees C? Consider a gas mixture in a 2.00 dm3 flask at 27.0 degrees Celsius that contains 3.25 g of H2 and 2.75 g of O2. A sample of hydrogen gas (h2) is collected over water at 19 degrees Celsius. A certain liquid has a vapor pressure of 92.0 Torr at 23.0 degrees Celsius and 250.0 Torr at 45.0 degrees Celsius. 2 What is the vapor pressure of methanol? A solution is composed of 1.20 mol cyclohexane(P_{cy} = 97.6 torr) and 2.40 mol acetone (P_{ac} = 229.5 torr). To find the partial pressure of the each liquid, we will find the mole fraction of the liquid as follows: {eq}\rm Mole\, fraction (x) = \dfrac{moles\, of\, substance (n)}{total\, moles (n_T)} P tot = P a + P b The partial pressures, P a and P b, are determined using Raoult's Law. At 45 degrees Celsius, the vapor pressure of benzene is 211 torr. The vapor pressure of ethanol (46.07 g/mol), C 2 H 5 OH, is 44 torr at the same temperature. Volatile solutes The partial pressures, Pa and Pb, are determined using Raoult's Law. 360 torr c. 400 torr d. 760 torr e. 0 torr, Calculate the vapor pressure of a solution of 0.39 mol of cholesterol in 5.4 mol of toluene at 32 C. Pure toluene has a vapor pressure of 41 torr at 32 C. Calculate the vapor pressure of a solution. Liquids - Vapor Pressures - Engineering ToolBox The vapor pressure of methanol, CH3OH, is 94 torr at 20 C. The vapor pressure of ethanol, C2H5OH, is 44 torr at the same temperature. ls the solution ideal? Answer in units of torr. The vapor pressure of pure ethanol at 60 degrees C is 349 mmHg. 18.1 torr b. (PDF) Fabrication procedures and process sensitivities for CdS/CdTe (d) 1 torr. Properties < Question 6 (of 10) points 2 attempts left Check my work Be sure to answer all parts. According to Raoult's Law, the vapor pressure of a solution of two volatile components can be calculated by the formula. ethanol = ? What is the vapor pressure of a 6.6% by mass aq ethylene glycol (HOC2H4OH) solution at 0oC? The data represent a small sub list of all available data in the Dortmund Data Bank. is 94 torr at 20 C. A substance has a heat of vaporization of 16.69 kJ/mol. All rights reserved. Der Dampfdruck ist der Druck, der sich einstellt, wenn sich in einem abgeschlossenen System ein Dampf mit der zugehrigen flssigen Phase im thermodynamischen Gleichgewicht befindet. Ans . A cocktail was prepared by mixing 20.0 grams of ethanol with 150 grams of water at 25 degrees Celsius. Between 20 and 80 degrees Celsius, the enthalpy of vaporization of benzene is 31.0 kJ/mol. that must be added to 1.00 kg of ethanol Get access to this video and our entire Q&A library, Dalton's Law of Partial Pressures: Calculating Partial & Total Pressures. 152 g c. 103 g d. 115 g e. 36 g. What is the vapor pressure (in mmHg) of a solution of 1.15 g of Br2 in 150.0 g of CCl4 at 300 K? What is the vapor pressure at 85^oC of a solution prepared from 100 mL of water (density 1.00 g/mL ) and 150 g of diglyme, C_6H_{14}O_3, a nonvo, At 25 degrees Celsius, the vapor pressure of pure pentane is 511 torr and that of hexane is 150 torr. Water has a vapour pressure of 23.76 torr at 25 degree C. What is the vapour pressure of a solution of sucrose ,if its mole fraction is 0.25? A mixture of benzene and acetone has a vapor pressure of 196 torr at room temperature (25 degrees Celsius). 7.2: Vapor Pressure - Chemistry LibreTexts All rights reserved. Solution for 22. The vapor pressure of pure water at 85^o C is 434 torr. {/eq}. \chi_{C_2H_5OH} = 1- 0.588 Using Raoult's law, calculate the mole fra. A. Partial pressure of O_2. 13.6: Vapor Pressures of Solutions - Chemistry LibreTexts Round your answer to 3 significant digits. It does not store any personal data. If you want to promote your products or services in the Engineering ToolBox - please use Google Adwords. A mixture of He, N2, and Ar has a pressure of 15.1 atm at 28.0 degrees Celsius. {/eq}, Vapor pressure of Ethanol = {eq}\rm P^o_{C_2H_5OH} = 222\ torr Explain. If its enthalpy of vaporization is 38.6 kJ/mol, at what temperature would the vapor pressure equal 250.0 mmHg? The partial pressure of a gas is a pressure exerted by an individual gas in a mixture of gases. is 12% ethanol by volume. For full table with Liquid Viscosity, Vapor Viscosity, Vapor Pressure, Vapor Specific Heat and Liquid Surface Tension - rotate the screen! Octane has a vapor pressure of 40 torr at 45.1 degrees Celsius and 400 torr at 104 degrees Celsius. The vapor pressure of water at 45.0 degrees Celsius is 71.93 torr. methanol vapor pressurevladimir cdi adblue delete. These cookies will be stored in your browser only with your consent. The pressure exerted by the vapor phase is called the vapor or saturation pressure Vapor or saturation pressure depends on temperature. Express your answer in torr. It occurs at equilibrium, i.e., when the molecules are both vaporizing and condensing at the same rate at a particular pressure. P_{total} = 94~torr \times 0.588 + 44~torr \times 0.412 The vapor pressures of ethanol (C_2H_5OH) and 1-propanol (C_3H_7OH) at 35 ^oC are 100 mmHg and 37.6 mmHg, respectively. The vapor pressure for methanol and ethanol at 50 C is 406 and 222 Torr, respectively. At a given temperature, pure A has a vapor pressure of 140 torr, and pure B has a vapor pressure of 60 torr. At 254.3 K, it has a vapor pressure of 92.44 mmHg. Calculate the geometric mean return for the following data set: KIMS conducts a wide range of technological R&D activities, including process improvements, application development, material enhancement, testing, and A sample of hydrogen gas is mixed with water vapor. What is the partial pressure of the O_2? What is the total vapor pressure of the ideal solution made up in the following concentrations? At 63.5 degree C the vapor pressure of H_2O is 175 torr, and that of ethanol ( C_2H_5OH) is 400 torr. A 0.24 B 0.25 C 0.26 D 0.27 Hard Solution Verified by Toppr Correct option is A) According to Raoult's law, p=p 0x p = partial vapour pressure of methanol P_{C_2H_5OH} = 0.33\times222\ torr\\ What is the partial pressure of dry air in our lungs when the total pressure is 745 torr? It also has the highest vapor pressure. What is the mole fraction o. \chi_{CH_3OH} + P^\circ_{C_2H_5OH} . \text{(46.07 g/mol)}, C_2H_5OH, \text{ is 44 torr } The vapor pressure of ethanol is 10 torr at -2.3 degrees C and 40 torr at 19 degrees C.--- . But opting out of some of these cookies may affect your browsing experience. What is the partial pressure of the hydrogen gas? 245 C 4. asked by Anonymous April 23, 2016 1 answer The vapor pressure of pure methanol is 760 mm at this temperature. So, for example, methanol has a vapor pressure of 94 torr at 25 C, and ethanol has a vapor pressure of 44 torr at 25 C. Assume the solution Determine the vapor pressure of a solution composed of 1.00 mol of liquid A and 3.00 mol of liquid B. (Given: R = 8.314 J/molK). ethanol = 1 methanol = 1 0. A certain liquid has a vapor pressure of 92.0 Torr at 23.0^oC and 324.0 Torr at 45.0^oC. A 4.35-g sample of methanol is placed in a 3.00 L container at 25.0C. Out of these, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. How do you calculate the ideal gas law constant? Vapor pressure is directly related to the kinetic energy of a molecule. Vapor pressure is the pressure exerted by the vapor molecules of a substance in a closed system. Question: W See Periodic Ta At 20.0C, the vapor pressure of ethanol is 45.0 torr, and the vapor pressure of methanol is 92.0 torr. ), Equal moles of pure liquid benzene (vapor pressure of 94.2 torr) and pure liquid toluene (vapor pressure of 28.4 torr) are mixed together. A. Get access to this video and our entire Q&A library, Dalton's Law of Partial Pressures: Calculating Partial & Total Pressures. \\ Component Last Post; May 23, 2021; At 20 C, the vapour pressure of pure ethanol is 32.1 torr and Round each of your answers to 3 significant digits. The vapor pressure of water at this temperature is 26.02 torr. At 25 C, the density of water is 0.9971 g/cm3 Wasn't in class for example problems so I don't know what goes . Therefore viscosity, surface tension and density will decrease and vapor . Question: The vapor pressure of methanol, \({\bf{C}}{{\bf{H}}_{\bf{3}}}{\bf{OH}}\) , is 94 tor at 20 C. Methanol, CH3OH (32.04 g/mol) has a melting point equal to 176 K and a boiling point equal to 338 K. Using the thermodynamic data below, water. [Pg.225] gifts. The cookies is used to store the user consent for the cookies in the category "Necessary". Paul Flowers, Klaus Theopold, Richard Langley. What is the mole fraction in the vapor? So, for example, methanol has a vapor pressure of 94 torr at 25 C, and ethanol has a vapor pressure of 44 torr at 25 C. The vapor pressure for methanol and ethanol at 50 C is 406 and 222 Torr, respectively. Which liquid has the highest vapor pressure? 31 torrs b. Calculate the partial pressure, Between 20 and 80 degrees Celsius, the enthalpy of vaporization of benzene is 31.0 kJ/mol. psolution = Xmethanol*Po 642.3 = Xmethanol*760 a. {/eq} at the same temperature. Determine the vapor pressure of a solution composed of 1.00 mol of liquid A and 3.00 mol of liquid B. 45.3 g The measurement uncertainty in repeatability is obtained as 1.95% for deionized (DI) water and 1.34% for pure methanol, respectively. At that temperature, the vapor pressure of benzene and acetone are 0.125 atm and 230 torr, respectively. The vapor pressure of water at 25 degree C is 23.8 torr. {/eq}, First, we will calculate the moles of methanol and ethanol using mass and molar mass, moles of methanol = {eq}\rm \frac{mass}{molar~mas} Performance cookies are used to understand and analyze the key performance indexes of the website which helps in delivering a better user experience for the visitors. Solved At 20.0C, the vapor pressure of ethanol is 45.0 | Chegg.com x_{C_2H_5OH} = 0.33 (Given: R = 8.314 J/molK), A sample of O2(g) is saturated with water vapor at 27 degrees C. The total pressure of the mixture is 772 torr, and the vapor pressure of water is 26.7 torr at 27 degrees C. What is the partial pressu, At 25 degrees Celsius the vapor pressure of pure pentane is 511 torr and that of hexane is 150 torr. If I collect a gas over this water, and the total gas pressure of the gas solution is found to be 277.9 torr, what would be the pressure of the pure gas? What are the units used for the ideal gas law? At a given temperature, pure A has a vapor pressure of 140 torr, and pure B has a vapor pressure of 60 torr. Contact China Trader Jinan Tochem Co., Ltd for the product Methanol. What liquid has the highest vapor pressure? {/eq}. What is its vapor pressure at 95 ^oC? 44.4 torr, Butanone (CH3CH2COCH3) has a vapor pressure of 100 Torr at 25 degrees C; at the same temperature, propanone (CH3COCH3) has a vapor pressure of 222 Torr. is ideal. So let's break this down. Calculate the vapor pressure in mmHg and torr. What is the vapor pressure in torr above a solution prepared by mixing 66.73 g of benzene, C6H6, with 63.26 g toluene, C6H5CH3, at 20 degrees Celsius? 2.87 C. 3.87 D. 4.87 E. 5.87, The vapor pressure of pure benzene, C_6H_6 at 20^o C is 75mm Hg while the vapor pressure of toluene, C_7H_8 at this temperature is 22 mm Hg. A mixture of gases has the following partial pressure for the component gases at 20 degrees Celsius: Oxygen 180.0 torr, Nitrogen 3200 torr, and Hydrogen 246.0 torr. What is the partial pressure of the O_2 ? Round each of your answers to 3 significant digits. copyright 2003-2023 Homework.Study.com. solution prepared by mixing 2.5 moles of methanol and 3.3 moles of By clicking Accept All, you consent to the use of ALL the cookies. 4) A mixture of 90.0 grams of CH4 and 10.0 grams of argon has a pressure of 250 torr under conditions of constant temperature and volume. vapor pressure of methanol at 20{eq}\rm ^\circ C Exam 1-solutions - Exam 1 for Dr. Fakhreddine's CH 302 class. Methanol (methyl alcohol, carbinol, wood alcohol, wood naptha or wood spirits) is a chemical compound with chemical formula CH 3 OH. Calculate the vapor pressure in mmHg and torr. Learn about the partial pressure definition, the partial pressure formula, and Dalton's Law of Partial Pressures, and see examples. The mole fraction of methanol and ethanol of a solution is: \({\rm{Mole}}\;{\rm{ = }}\;\dfrac{{{{\rm{X}}_{\rm{A}}}}}{{{{\rm{X}}_{\rm{A}}}{\rm{ + }}{{\rm{X}}_{\rm{B}}}}}\), \(\begin{aligned}{\rm{C}}{{\rm{H}}_{\rm{3}}}{\rm{OH}} &= \;{\rm{32}}{\rm{.04246}}\;{\rm{g}}\;{\rm{mo}}{{\rm{l}}^{{\rm{ - 1}}}}\\{{\rm{C}}_{\rm{2}}}{{\rm{H}}_{\rm{5}}}{\rm{OH}} &= \;{\rm{46}}{\rm{.063}}\;{\rm{g}}\,{\rm{mo}}{{\rm{l}}^{{\rm{ - 1}}}}\end{aligned}\), \(\begin{aligned}{\rm{Mole}}\;{\rm{of}}\;{\rm{C}}{{\rm{H}}_{\rm{3}}}{\rm{OH}} &= \;\dfrac{{{\rm{50}}{\rm{.0}}\;{\rm{g}}}}{{{\rm{32}}{\rm{.04246}}\;{\rm{g}}\;{\rm{mo}}{{\rm{l}}^{{\rm{ - 1}}}}}}\\{\rm{Mole}}\;{\rm{of}}\;{\rm{C}}{{\rm{H}}_{\rm{3}}}{\rm{OH}} &= \;{\rm{1}}{\rm{.5604}}\;{\rm{mole}}\end{aligned}\), \(\begin{aligned}{\rm{Mole}}\;{\rm{of}}\;{{\rm{C}}_{\rm{2}}}{{\rm{H}}_{\rm{5}}}{\rm{OH}} &=\;\dfrac{{{\rm{50}}{\rm{.0}}\;{\rm{g}}}}{{{\rm{46}}{\rm{.063}}\;{\rm{g}}\;{\rm{mo}}{{\rm{l}}^{{\rm{ - 1}}}}}}\\{\rm{Mole}}\;{\rm{of}}\;{\rm{C}}{{\rm{H}}_{\rm{3}}}{\rm{OH}}\ &= \;{\rm{1}}{\rm{.0853}}\;{\rm{mole}}\end{aligned}\), \(\begin{aligned}{{\rm{X}}_{{\rm{C}}{{\rm{H}}_{\rm{3}}}{\rm{OH}}}} &= \;\frac{{{\rm{1}}{\rm{.5604}}}}{{\left( {{\rm{1}}{\rm{.5604 + 1}}{\rm{.0853}}} \right)}}\\{{\rm{X}}_{{\rm{C}}{{\rm{H}}_{\rm{3}}}{\rm{OH}}}} &= \;{\rm{0}}{\rm{.590}}\\{{\rm{X}}_{{{\rm{C}}_{\rm{2}}}{{\rm{H}}_{\rm{5}}}{\rm{OH}}}} &= \;\dfrac{{{\rm{1}}{\rm{.0853}}}}{{\left( {{\rm{1}}{\rm{.5604 + 1}}{\rm{.0853}}} \right)}}\\{{\rm{X}}_{{{\rm{C}}_{\rm{2}}}{{\rm{H}}_{\rm{5}}}{\rm{OH}}}} &= \;{\rm{0}}{\rm{.410}}\end{aligned}\), \(\begin{aligned}{{\rm{C}}{{\rm{H}}_{\rm{3}}}{\rm{OH: 0}}{\rm{.590 \times 94 torr = 55 torr}}}\\{{\rm{C}}_{\rm{2}}{{\rm{H}}_{\rm{5}}}{\rm{OH: 0}}{\rm{.410 \times 44 torr = 18 torr}}}\end{aligned}\). We also use third-party cookies that help us analyze and understand how you use this website. {/eq}, {eq}\rm x_{C_2H_5OH} = \dfrac{n_{C_2H_5OH}}{n_{CH_3OH} + n_{C_2H_5OH}} \\ If its enthalpy of vaporization is 38.6 kJ/mol, at what temperature would the vapor pressure equal 250.0 mmHg? What is the vapor temperature. Substance What is the mole fraction of pentane in a pentane-hexane solution that has a vapor pressure of 333 torr, A sample of O2 gas was collected over water at 23 degrees Celsius and 548 torr. At 25 degrees Celsius the vapor pressure of pure pentane is 511 torr and that of hexane is 150 torr. The cookie is set by the GDPR Cookie Consent plugin and is used to store whether or not user has consented to the use of cookies. Determine the mass of glucose (molar mass = 180 g/mol) needed to add to 500. g of water to change the vapor pressure to 23.1 torr. What is its vapor pressure at 57.5 degrees Celsius? {/eq} of ethanol. Only emails and answers are saved in our archive. Find the temperature and pressure of the SO_2 triple point. Use the Clausius-Clapeyron equation to solve this problem. The vapor pressure of methanol (32.043 g/mol), CH_3OH, is 94 torr at 20^o C. The vapor pressure At 25 degrees Celsius, the vapor pressure of ethanol is 45 torr when pure. A sample of oxygen gas is saturated with water vapor at 27 C. The total pressure of the mixture is 814 torr, and the vapor pressure of water is 26.9 torr at 27 C. What is the partial pressure of, A gaseous mixture contains 2.00 grams of H2(g) and 8.00 grams of N2(g) at a temperature of 0.00 degrees Celsius. Explain your reasoning. Therefore, 81.8 g of water. {/eq} The vapor pressure of ethanol {eq}\displaystyle The vapor pressure of ethanol (46.07 g/mol), C 2 H 5 OH, is 44 torr at the same temperature. Calculate the vapor pressure of water at 25.0 o C . 66.6 torr c. 68.3 torr d. 70.1 torr e. 65.0 torr. What mass of propanone must be mixed with 3, A sample of O_2 gas was collected over water at 23 degree C and 711 torr. What is the mole fra. methanol and 23.9 g of ethanol. Supersaturated solutions of most gases in water are prepared by heating saturated solutions. The total pressure in a flask containing air and ethanol at 257 degrees C is 882 mmHg. A mixture of benzene and acetone has a vapor pressure of 196 torr at room temperature (25 degrees Celsius). Explanation: Thus at room temperature, the substance with the lowest boiling point will have the highest vapor pressure (easiest to get into the gas phase). A sample of oxygen gas is saturated with water vapor at 27 C. The total pressure of the mixture is 814 torr, and the vapor pressure of water is 26.9 torr at 27 C. What is the partial pressure of. its vapor pressure by 10.0 torr at 35 degree C. The vapor pressure Calculate the total vapor pressure above a solution of {eq}\displaystyle At 25 degrees C, the vapor pressure of pure pentane is 511 torr and that of hexane is 150 torr. {/eq} = 44 torr. and the vapor What is the composition of a methanol (CH3OH) propanol The vapor pressures of pure liquid A and pure liquid B are 45.9 torr and 99.2 torr, respectively. {/eq}. Click hereto get an answer to your question The vapour pressures of ethanol and methanol are 44.5 mm and 88.7 mm Hg respectively. CH3CH2CH2F is the largest and only polar compound and therefore has the greatest intermolecular forces (both dipole-dipole and the greatest London Dispersion forces) and is eliminated. Round each of your answers to 3 significant digits. 2. \\ You also have the option to opt-out of these cookies. What is the vapor pressure of a 6.6% by mass aq ethylene glycol (HOC2H4OH) solution at 0oC? 75C. 2. Can any one help me step-by-step with this? Use the Clausius-Clapeyron equation to solve this problem. Calculate its vapor pressure at 275.7 K. Calculate the vapor pressure of ethanol and the vapor pressure of water at 62.5 ^oC. If the container is closed and the methanol reaches equilibrium with its vapor, what mass (in grams) of liquid methanol remain? Supersaturated solutions of most solids in water are prepared by cooling saturated solutions. 239.9 What is the vapor pressure of a solution of these two substances if te mole fraction of benzene is 0.30? In general 40C is the temperature chosen to evaporate methanol mixtures. 0.570 = 0.430# because mole ratios always sum to #1#. methyl chloride A certain liquid has a vapor pressure of 92.0 Torr at 23.0 degrees Celsius and 250.0 Torr at 45.0 degrees Celsius. What is the vapor pressure at 17 degree celsius? and the vapor pressure of methanol is 92 torr. The heat of vaporization of water is 40.65 KJ/mol and the vapor pressure of water is 92.7 Torr at 50 o C . Methanol | CH3OH or CH4O | CID 887 - structure, chemical names, physical and chemical properties, classification, patents, literature, biological activities, safety/hazards/toxicity information, supplier lists, and more. Explain. The vapor pressure of pure water at 50.0 ^oC is 92.5 mmHg. At 20.0 C, the vapor pressure of ethanol is 5.95 kPa, and at 63.5 C, its vapor pressure is 53.3 kPa. ), Methyl salicylate, C8H8O3, the odorous constituent of oil of wintergreen, has a vapor pressure of 1.00 torr at 54.3 degrees C and 10.0 torr at 95.3 degrees C. A. Calculate the pressure of the m. Calculate the pressure of ethanol vapor, C_2H_5OH(g), \ at \ 82.0^\circ C if 1.000 mol C_2H_5OH(g) occupies 30.00 L. Use the van der Waals equation. Look it up and solve. Vapor Pressure Burdick & Jackson solvents are arranged in order of increasing vapor pressure, the pressure exerted when the liquid phase of the solvent is in equilibrium with its vapor phase (at 20C unless otherwise indicated). Not included: Methyl Isoamyl Ketone Petroleum Ether Propylene Carbonate Trifluoroacetic Acid Water has a vapour pressure of 23.76 torr at 25 degree C. What is the vapour pressure of a solution of sucrose ,if its mole fraction is 0.25? Disclosed are methods of solvent removal in an evacuated, closed system at ambient or low (spontaneously dropped due to evaporation endothermicity) temperature. For example, at any given temperature, methyl chloride has the highest vapor pressure of any of the liquids in the chart. What is the specific heat capacity of methanol? The solution is then allowed to reach equilibrium with i, The vapor pressure of liquid methanol. {/eq}. b) Calculate the normal boiling point of this liquid. Which liquid has the lowest Vapour pressure? Hf (kJ/mol) torr 100 torr c. 47.6 to, A mixture of 0.2mole of alcohol A and 0.5mole of alcohol has a total vapor pressure of 40mmHg at 298k, if the mixture obeys Raoult's law, find the pure pressure of B at 298k given that the pressure of.



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vapor pressure of methanol in torr

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