- f U - of formation of CH 4 g at certain temperature is- 393 kJ mol -1- The value of - f H - isa zero b - f U -d equal to - f U -

(b) The reaction is CH_4(g)+2O_2(g)→ CO_2(g)+2H_2O(l) Δ n_g = (n_p n_r)_g =1 3= 2 Δ_f H^ e= Δ_f U^⊖ + Δ n_g RT As Δ n_g = 2 ∴ Δ_f H^⊖ lt; Δ_f U^⊖ ...

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Heat of Formation

Δ f U ⊖ of fo...

Question

$Δ_{f} U^{⊖}$ of formation of $C H_{4} (g)$ at certain temperature is-393 kJ $m o l^{- 1}$ . The value of $Δ_{f} H^{⊖}$ is
(a) zero
(b) $< Δ_{f} U^{⊖}$
(c) $> Δ_{f} U^{⊖}$
(d) equal to $Δ_{f} U^{⊖}$

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