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Which one of the following reactions is spontaneous at all temperatures?  Group of answer choices N2(g) + 3 F2(g) → 2 NF3(g) ΔH° =−249 kJ/mol ; ΔS° = −278 J/K-mol N2(g) + 3 Cl2(g) → 2 NCl3(g) ΔH° = +460 kJ/mol; ΔS° = −275 J/K-mol N2F4(g) → 2 NF2(g) ΔH° =+85 kJ/mol ; ΔS° = +198 J/K-mol NH4NO3(s) → N2O(g) + 2H2O(ℓ) ΔH° =−125 kJ/mol ; ΔS° = +209 J/K-mol

Which one of the following reactions is spontaneous at all temperatures?  Group of answer choices N2(g) + 3 F2(g) → 2 NF3(g) ΔH° =−249 kJ/mol ; ΔS° = −278 J/K-mol N2(g) + 3 Cl2(g) → 2 NCl3(g) ΔH° = +460 kJ/mol; ΔS° = −275 J/K-mol N2F4(g) → 2 NF2(g) ΔH° =+85 kJ/mol ; ΔS° = +198 J/K-mol NH4NO3(s) → N2O(g) + 2H2O(ℓ) ΔH° =−125 kJ/mol ; ΔS° = +209 J/K-mol

General Chemistry - Standalone book (MindTap Course List)
General Chemistry - Standalone book (MindTap Course List)
11th Edition
ISBN:9781305580343
Author:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell
Publisher:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell
Chapter18: Thermodynamics And Equilibrium
Section: Chapter Questions
Problem 18.20QP: Given the following information at 25C, calculate G at 25C for the reaction 2A(g)+B(g)3C(g)...
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Which one of the following reactions is spontaneous at all temperatures? 
Group of answer choices
N2(g) + 3 F2(g) → 2 NF3(g) ΔH° =−249 kJ/mol ; ΔS° = −278 J/K-mol
N2(g) + 3 Cl2(g) → 2 NCl3(g) ΔH° = +460 kJ/mol; ΔS° = −275 J/K-mol
N2F4(g) → 2 NF2(g) ΔH° =+85 kJ/mol ; ΔS° = +198 J/K-mol
NH4NO3(s) → N2O(g) + 2H2O(ℓ) ΔH° =−125 kJ/mol ; ΔS° = +209 J/K-mol
Expert Solution
Step 1

∆G = ∆H - T∆S

For ∆H = -ve and ∆S = +ve, reaction will be spontaneous at all temperature (∆G <0)

 

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