A non-spontaneous reaction with ΔG = +30 kJ can be driven if coupled to a reaction with
- A
ΔH = 0
- B
ΔS = 0
- Ccheck_circle
ΔG = −50 kJ
- D
ΔG = +50 kJ
Explanation
Sum must be negative. +30 + (−50) = −20 kJ; coupled ΔG of −50 drives it.
Coupled Reactions
AP Chemistry· difficulty 4/5
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