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Assertion : $\Delta H$ and $\Delta E$ are almost the same for the reaction, $\mathrm{N}_{2(\mathrm{~g})}+\mathrm{O}_{2(\mathrm{~g})} \rightleftharpoons 2 \mathrm{NO}(\mathrm{g}$.
Reason : All reactants and products are gases.
Options:
Reason : All reactants and products are gases.
Solution:
1208 Upvotes
Verified Answer
The correct answer is:
If both assertion and reason are true and the reason is not the correct explanation of the assertion
$\Delta H=\Delta E+\Delta n R T$
$\Delta n=$ change in number of moles of products and reactant species.
$$
\begin{aligned}
& \mathrm{N}_{2(g)}+\mathrm{O}_{2(g)} \rightleftharpoons 2 \mathrm{NO}_{(g)} \\
\Delta n= & 2-2=0 \\
\Delta H= & \Delta E+0 \times R T \text { or, } \Delta H=\Delta E .
\end{aligned}
$$
$\Delta n=$ change in number of moles of products and reactant species.
$$
\begin{aligned}
& \mathrm{N}_{2(g)}+\mathrm{O}_{2(g)} \rightleftharpoons 2 \mathrm{NO}_{(g)} \\
\Delta n= & 2-2=0 \\
\Delta H= & \Delta E+0 \times R T \text { or, } \Delta H=\Delta E .
\end{aligned}
$$
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