For which one of the following reactions, H is not equal to E - Vidyadip

MCQ

For which one of the following reactions, $\Delta H$ is not equal to $\Delta E$

A
${H_{2(g)}} + {I_{2(g)}}$ $ \rightleftharpoons $ $2H{I_{(g)}}$
B
${C_{(s)}} + {O_{2(g)}}$ $ \rightleftharpoons $ $C{O_{2(g)}}$
✓
${N_{2(g)}} + 3{H_{2(g)}}$ $ \rightleftharpoons $ $2N{H_{3(g)}}$
D
$HC{l_{(aq)}} + NaO{H_{(aq)}}$ $ \rightleftharpoons $ $NaC{l_{(aq)}} + {H_2}O$

✓

Answer

Correct option: C.

${N_{2(g)}} + 3{H_{2(g)}}$ $ \rightleftharpoons $ $2N{H_{3(g)}}$

(c)In this reaction $\Delta n = 2 - 4 = - 2$ so $\Delta H \ne \Delta E$.

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