Question:
∆fUᶱ of formation of CH4 (g) at certain temperature is –393 kJ mol–1. The
value of ∆ fHᶱ is
(i) zero
(ii) < ∆f Uᶱ
(iii) > ∆f Uᶱ
(iv) equal to ∆f Uᶱ
Solution:
Option (ii) < ∆f Uᶱ is the answer.
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