Answered: Which reactions have a positive ASrxn?…

Which reactions have a positive ASrxn? A(g) + B(g) → C(g) 2 A(g) + 2 B(g) –→ 5 C(g) A(s) + B(g) → 2 C(g) O 2 A(g) + 2 B(g) → 3 C(g)

Chemistry by OpenStax (2015-05-04)

1st Edition

ISBN:9781938168390

Author:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser

Publisher:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser

Chapter5: Thermochemistry

Section: Chapter Questions

Problem 2E: Prepare a table identifying several energy transitions that take place during the typical operation...

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Question

Which reactions have a positive ASrxn?
A(g) + B(g) → C(g)
2 A(g) + 2 B(g) → 5 C(g)
A(s) + B(g) → 2 C(g)
2 A(g) + 2 B(g) → 3 C(g)

Expert Solution

Step 1

Entropy is used to describe randomness in the system. Entropy change of a reaction, ΔS_rxn is the difference in the entropies of the reactants and products. It can be represented as follow:

$∆ S_{rxn} = S_{P} - S_{R}$

where S_P is entropy of products and S_R is entropy of reactants.

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