Question

Assignment 3

Exercise 17.30

17 of 24

Constants | Periodic Table Without doing any calculations, determine the sign of ΔSsys and ΔSsurr for each of the chemical reactions below.

Part A 2CO(g)+O2(g)→2CO2(g)ΔrH∘= -566.0 kJmol−1 -566.0 ΔSsys>0, ΔSsurr>0 ΔSsys<0, ΔSsurr>0 ΔSsys>0, ΔSsurr<0 ΔSsys<0, ΔSsurr<0

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Part B

2NO2(g)→2NO(g)+O2(g)ΔrH∘= 113.1 kJmol−1

113.1

ΔSsys>0, ΔSsurr>0

ΔSsys<0, ΔSsurr>0

ΔSsys>0, ΔSsurr<0

ΔSsys<0, ΔSsurr<0

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Part C

2H2(g)+O2(g)→2H2O(g)ΔrH∘= -483.6 kJmol−1

-483.6

ΔSsys>0, ΔSsurr>0

ΔSsys<0, ΔSsurr>0

ΔSsys>0, ΔSsurr<0

ΔSsys<0, ΔSsurr<0

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Part D

CO2(g)→C(s)+O2(g)ΔrH∘= 393.5 kJmol−1

393.5

ΔSsys>0, ΔSsurr>0

ΔSsys<0, ΔSsurr>0

ΔSsys>0, ΔSsurr<0

ΔSsys<0, ΔSsurr<0

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Part E

In addition, predict under what temperatures (all temperatures, low temperatures, or high temperatures), if any, the reaction in part A will be spontaneous.

In addition, predict under what temperatures (all temperatures, low temperatures, or high temperatures), if any, the reaction in part A will be spontaneous.

The reaction is spontaneous at all temperatures.

The reaction is spontaneous at low temperatures.

The reaction is spontaneous at high temperatures.

The reaction is nonspontaneous at all temperatures.

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Part F

In addition, predict under what temperatures (all temperatures, low temperatures, or high temperatures), if any, the reaction in part B will be spontaneous.

In addition, predict under what temperatures (all temperatures, low temperatures, or high temperatures), if any, the reaction in part B will be spontaneous.

The reaction is spontaneous at all temperatures.

The reaction is spontaneous at low temperatures.

The reaction is spontaneous at high temperatures.

The reaction is nonspontaneous at all temperatures.

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Part G

In addition, predict under what temperatures (all temperatures, low temperatures, or high temperatures), if any, the reaction in part C will be spontaneous.

In addition, predict under what temperatures (all temperatures, low temperatures, or high temperatures), if any, the reaction in part C will be spontaneous.

The reaction is spontaneous at all temperatures.

The reaction is spontaneous at low temperatures.

The reaction is spontaneous at high temperatures.

The reaction is nonspontaneous at all temperatures.

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Part H

In addition, predict under what temperatures (all temperatures, low temperatures, or high temperatures), if any, the reaction in part D will be spontaneous.

In addition, predict under what temperatures (all temperatures, low temperatures, or high temperatures), if any, the reaction in part D will be spontaneous.

The reaction is spontaneous at all temperatures.

The reaction is spontaneous at low temperatures.

The reaction is spontaneous at high temperatures.

The reaction is nonspontaneous at all temperatures.

Answer 1