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Question
Which reaction, with the following value of ΔH, ΔS at 400 K is spontaneous and endothermic?
Options
ΔH = – 48 kJ, ΔS = + 135 J/K
ΔH = – 48 kJ, ΔS = – 135 J/K
ΔH = + 48 kJ, ΔS = + 135 J/K
ΔH = + 48 kJ, ΔS = – 135 J/K
MCQ
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Solution
ΔH = + 48 kJ, ΔS = + 135 J/K
Explanation:
ΔG = ΔH – T Δ S
= 48000 – 400 × 135
= 48000 – 54000
= – 6000 J mol–1
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Spontaneity
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