Reaction, H_2 (g) + I_2 (g) 2HI(g) H = - 12.40 ,kcal. According t… - Vidyadip

MCQ

Reaction, ${H_2}(g) + {I_2}(g) \to 2HI(g)$ $\Delta H = - 12.40\,kcal$. According to this, the heat of formation of $ HI $ will be......$kcal$

A
$12.4 $
B
$-12.4$
✓
$-6.20$
D
$6.20$

✓

Answer

Correct option: C.

$-6.20$

(c)Heat of formation is for $1 $ mole.
Hence $\Delta H_f^o\,(HI) = - 12.40/2 = - 6.20\,kcal.$

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