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Q.

For the reaction FeCO3(s)⟶FeO(s)+CO2(g);ΔH=82.8kJ at 25∘C what is (ΔE or ΔU) at 25"C?

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a

 85.28 kJ 

b

 -2394.77 kJ

c

 30.32 kJ

d

 82.8 kJ 

answer is B.

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Detailed Solution

ΔH=ΔE+ΔngRT⇒ 82.8=ΔE+1×8.314×2981000⇒ ΔE=80.32

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