Question

$\Delta_fU^0$ of formation of CH₄(g) at certain temperature is –393 kJ mol⁻¹. The value of $\Delta_fH^0$ is
(a) zero
(b) < $\Delta_fU^0$
(c) > $\Delta_fU^0$
(d) equal to $\Delta_fU^0$

Answer 1

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✏ Option [A.] is Correct

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Answer 2

I m not sure. Pls tell me whether I m right or wrong.