Consider each of the following reactions and decide whether the standard entropy change for the reaction will be, (a) Negative; or (b) Positive; or (c) Very close to Zero. Cu (s) + 2 H2SO4 (aq) = CuSO4 (aq) + 2 H20 (1) + SO2 (g) N2 (g) + 3 H2 (g) = 2 NH3 %3D 1 (g) 1. negative NH3 (g) + HCI (g) = NH4CI 1 (s) 2. positive 1 2 Na (1) + H2 (g) = 2 NaH (s) %3D 3. very close to zero Mg (s) + CO2 (g) = MgO (s) + CO (g) %3D 2 2 H20 (1) = 2 H2 (g) + O2 (g) <>

Chemistry: The Molecular Science
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Chapter16: Thermodynamics: Directionality Of Chemical Reactions
Section: Chapter Questions
Problem 59QRT
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Consider each of the following reactions and decide whether the standard entropy
change for the reaction will be, (a) Negative; or (b) Positive; or (c) Very close to Zero.
Cu (s) + 2 H2SO4 (aq) =
CuSO4 (aq) + 2 H2O (1) +
SO2 (g)
N2 (g) + 3 H2 (g) = 2 NH3
1
(g)
1. negative
NH3 (g) + HCI (g) = NH4CI
%3D
1
(s)
2. positive
1
2 Na (1) + H2 (g) = 2 NaH (s)
3. very close to zero
Mg (s) + CO2 (g) = MgO (s)
+ CO (g)
%3D
2
2 H20 (1) = 2 H2 (g) + O2 (g)
Transcribed Image Text:Consider each of the following reactions and decide whether the standard entropy change for the reaction will be, (a) Negative; or (b) Positive; or (c) Very close to Zero. Cu (s) + 2 H2SO4 (aq) = CuSO4 (aq) + 2 H2O (1) + SO2 (g) N2 (g) + 3 H2 (g) = 2 NH3 1 (g) 1. negative NH3 (g) + HCI (g) = NH4CI %3D 1 (s) 2. positive 1 2 Na (1) + H2 (g) = 2 NaH (s) 3. very close to zero Mg (s) + CO2 (g) = MgO (s) + CO (g) %3D 2 2 H20 (1) = 2 H2 (g) + O2 (g)
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