Chemistry for Engineering Students
4th Edition
ISBN:9781337398909
Author:Lawrence S. Brown, Tom Holme
Publisher:Lawrence S. Brown, Tom Holme
Chapter10: Entropy And The Second Law Of Thermodynamics
Section: Chapter Questions
Problem 10.78PAE: Why is it usually easier to use G to determine the spontaneity of a process rather than Su ?
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Question
Transcribed Image Text:Calculate AS° for C3H4(g) + 2 H2(g)→ C3H3(g).
Substance
S° (J/mol•K)
C3H4 (g)
266.9
H2 (g)
130.6
C3HB (g)
269.9
Expert Solution
Introduction
Entropy can be define as A thermodynamic quantity that represents the lack of availability of the thermal energy of a system for conversion into mechanical operation, often translated as the degree of system disorder or randomness.
Entropy change can be calculated by subtracting the entropies of reactants from the entropies of products
Given data
The reaction is :
| Substance | S0 (J/mol.k0 |
| C3H4 | 266.9 |
| H2 | 130.6 |
| C3H8 | 269.9 |
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