For the hypothetical reaction A2(g)+B2(g)⇌2AB(g) If ΔrG∘ and ΔrS∘ are 20 kJ/mole and −20JK−1mol−1 respectively at 200 K. ΔrCp is 20 JK−1mol−1 then determine ΔH∘ at 400 K.
A
20 kJ/mol
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B
30 KJ/MOLE
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C
12kj/mole
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D
23kj/mole
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Solution
The correct option is A 20 kJ/mol ΔH1=ΔGo+TΔSo=20+200(−20)=−3980KJ