Exercise 18.70Consider the evaporation of methanol at 25.0 °C:Part CCH3 ОН (1) — СH3ОН (9).Рсн,он — 110.0mmHgYou may want to reference (Page) Section 18.9 while completingthis problem.Express the free energy change in kilojoules to one decimal place.AG° =kJSubmitPrevious Answers Request AnswerX Incorrect; Try Again; 2 attempts remainingPart DPCH,OH = 13.00mmHgExpress the free energy change in kilojoules to one decimal place.HVα ΑΣφkJAG° =SubmitRequest AnswerPart E ?AG° =kJSubmitRequest AnswerPart EThe vapor pressure of methanol is 143 mmHg. Identify the best reason to explain why methanol spontaneously evaporates in open air at 25.0°C andstandard pressure (760 mmHg).O Under these nonstandard conditions, the partial pressure of methanol is lower than its vapor pressure.Heat can be added under these nonstandard conditions to increase the vapor pressure of methanol.O The calculated standard free energy change corresponds to a spontaneous reaction.O Calculations for a closed container show a partial pressure of methanol lower than its vapor pressure.SubmitRequest AnswerNext >Provide FeedbackMacBook Pro"8"8Th8Ams

ΔG∘(CH3OH(g))=-162.3 KJ.mol-1 ΔG∘((CH3OH(l))=-166.6 KJ.mol-1 ΔG∘ =ΔG∘(Products) -ΔG∘(Reactants) ΔG∘=-162.3 - (-166.6) = +4.3 KJPART C PCH3OH= 110.0 mmHg (GIVEN) ΔG=ΔG∘+R T lnQ ΔG∘=4.3 KJ/mol R=8.314 J/mol.K = 0.008314 KJ/mol.K T=298K Q=P(CH3OH) =110.0 mmHg ( 1mmHg =0.00133322 bar) =0.146655 bar ΔG∘=4.3 +0.008314* 298* ln(0.146655 ) = -0.456 KJ ΔG∘=-0.456 KJPART D PCH3OH= 13.00 mmHg (GIVEN) ΔG=ΔG∘+R T lnQ ΔG∘=4.3 KJ/mol R=8.314 J/mol.K = 0.008314 KJ/mol.K T=298K Q=P(CH3OH) =13.00 mmHg ( 1mmHg =0.00133322 bar) =0.0173319 bar ΔG∘=4.3 +0.008314* 298* ln(0.0173319 ) = -6.95 KJ ΔG∘=-6.95 KJ

Science

Chemistry

Consider the evaporation of methanol at 25.0°C: Part C CH3OH (1) + CH3 OH (9). Рсн,он — 110.0mmHg You may want to reference (Page) Section 18.9 while completing this problem. Express the free energy change in kilojoules to one decimal place. AG° = kJ

Consider the evaporation of methanol at 25.0°C: Part C CH3OH (1) + CH3 OH (9). Рсн,он — 110.0mmHg You may want to reference (Page) Section 18.9 while completing this problem. Express the free energy change in kilojoules to one decimal place. AG° = kJ

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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