DSSUR                                                                                                                                                                                      (give units)                                                                                                                         DSTOT                                                                                                                                                                                                                                                    (give units)     (B) Does the spontaneity of this reaction change with temperature?  Please explain.  If there is a crossover temperature, calculate it.

Principles of Modern Chemistry
8th Edition
ISBN:9781305079113
Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Publisher:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Chapter13: Spontaneous Processes And Thermodynamic Equilibrium
Section: Chapter Questions
Problem 25P
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1.) Here is the reaction of carbon monoxide and hydrogen to form gaseous methanol at 298 K.

This reaction is spontaneous at 298 K under standard conditions.  

CO (g) + 2 H2 (g)   CH3OH (g

Substance

DHfo kJ/mol

      So         J/(K mol)

CH3OH (g) 

-201

239.9

H2 (g)

 

130.7

CO (g)

-110.5

197.7

(A) What is DSSUR in this problem?  What is DSTOT?  Is this consistent with your answer to (e)?

Please explain.   

 

                                                                                                                        DSSUR                                                                                                                                                                                      (give units)

                                                                                                                        DSTOT                                        

                                                                                                                                                                                                           (give units)  

 

(B) Does the spontaneity of this reaction change with temperature?  Please explain.  If there is a crossover temperature, calculate it.

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