For a reaction H_ 2 ( g ) + 1 2 O_ 2 ( g ) H_2 O_ ( l ) ; C_p = 3… - Vidyadip

MCQ

For a reaction ${H_{2\left( g \right)}} + \frac{1}{2}{O_{2\left( g \right)}} \longrightarrow {H_2}{O_{\left( l \right)}}$ ; $\Delta {C_p} = 32\,J{K^{ - 1}}$, $\Delta H$ at $27\,^oC = -285.8\, kJ\, mol^{-1}$. What will be the value of $\Delta H$ at $127\,^oC$ ?.....$kJ/mol$

A
$-289$
✓
$-282.6$
C
$-317$
D
$-253.8$

✓

Answer

Correct option: B.

$-282.6$

b
Krichoff's equation

$\Delta {C_p} = \frac{{\Delta {H_2} - \Delta {H_1}}}{{{T_2} - {T_1}}}$

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