Consider each of the following reactions and decide whether the standard entropy change for the reaction will be, (a) Positive; or (b) Very close to Zero; or (c) Negative. N2 (g) + 3 H2 (g) = 2 NH3 1 (g) 2 Na (1) + H2 (g) = 2 NaH (s) Cu (s) + 2 H2SO4 (aq) = 2 1. negative CusO4 (aq) + 2 H20 (1) + So2 (g) 2. positive PCI5 (s) = PC|3 (s) + Cl2 (g) 3. very close to zero H2 (g) + Cl2 (g) = 2 HCI (g) BaSO4 (s) + 2 H20 (g) = 1 BaSO4.2H2O (s)

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 22P: Use data from Appendix D to calculate the standardentropy change at 25°C for the reaction...
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Consider each of the following reactions and decide whether the standard entropy
change for the reaction will be, (a) Positive; or (b) Very close to Zero; or (c) Negative.
N2 (g) + 3 H2 (g) = 2 NH3
1
(g)
1
2 Na (1) + H2 (g) = 2 NaH (s)
Cu (s) + 2 H2SO4 (aq) =
2
1. negative
CusO4 (aq) + 2 H20 (1) +
SO2 (g)
2. positive
PCI5 (s) = PC|3 (s) + Cl2 (g)
2
3. very close to zero
H2 (g) + Cl2 (g) = 2 HCI (g)
BaSO4 (s) + 2 H20 (g) =
1
BaSO4.2H2O (s)
Transcribed Image Text:Consider each of the following reactions and decide whether the standard entropy change for the reaction will be, (a) Positive; or (b) Very close to Zero; or (c) Negative. N2 (g) + 3 H2 (g) = 2 NH3 1 (g) 1 2 Na (1) + H2 (g) = 2 NaH (s) Cu (s) + 2 H2SO4 (aq) = 2 1. negative CusO4 (aq) + 2 H20 (1) + SO2 (g) 2. positive PCI5 (s) = PC|3 (s) + Cl2 (g) 2 3. very close to zero H2 (g) + Cl2 (g) = 2 HCI (g) BaSO4 (s) + 2 H20 (g) = 1 BaSO4.2H2O (s)
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