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3. What is the value of AG° for combustion of ethanol? C2HsOH(I) + 302(g) → 2CO2(g) + 3H20(1) You are combusting the ethanol in an engine to do work. You need to do 450,000 J of work and the engine produces work at 23% efficiency. How many kg of ethanol do you need to combust to get the work done?

3. What is the value of AG° for combustion of ethanol? C2HsOH(I) + 302(g) → 2CO2(g) + 3H20(1) You are combusting the ethanol in an engine to do work. You need to do 450,000 J of work and the engine produces work at 23% efficiency. How many kg of ethanol do you need to combust to get the work done?

Chemistry: Principles and Practice
Chemistry: Principles and Practice
3rd Edition
ISBN:9780534420123
Author:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer
Publisher:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer
Chapter5: Thermochemistry
Section: Chapter Questions
Problem 5.46QE
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ThermoDynamic Data

C2H5OH = delta H = -278 KJ/mol, delta G = -175 KJ/mol, S = 161 J/K mol

3O2 = delta H = 0 KJ/mol, 3(0 KJ/mol), S = 205.152 J/K mol

2Co2 = delta H = -393.5 KJ/mol, 2(-394 KJ/mol), S = 214 J/K mol

3H2O = delta H = -242 KJ/mol, 3(-229 KJ/mol), S = 189 J/K mol

3. What is the value of AG° for combustion of ethanol? C2HsOH(I) + 302(g) → 2CO2(g) + 3H20(1) You are combusting the ethanol in an engine to do work. You need to do 450,000 J of work and the engine produces work at 23% efficiency. How many kg of ethanol do you need to combust to get the work done?
Transcribed Image Text:3. What is the value of AG° for combustion of ethanol? C2HsOH(I) + 302(g) → 2CO2(g) + 3H20(1) You are combusting the ethanol in an engine to do work. You need to do 450,000 J of work and the engine produces work at 23% efficiency. How many kg of ethanol do you need to combust to get the work done?
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