For which one of the following equations is $\Delta_{x} H^{\circ}$ equal to $\Delta_{\mathrm{f}}…

For which one of the following equations is $\Delta_{x} H^{\circ}$ equal to $\Delta_{\mathrm{f}} \mathrm{H}^{\circ}$ ?
  1. $\mathrm{CH}_{4}(\mathrm{~g})+2 \mathrm{Cl}_{2}(\mathrm{~g}) ightarrow \mathrm{CH}_{2} \mathrm{Cl}_{2}(\mathrm{l})+2 \mathrm{HCI}(\mathrm{g})$
  2. $\mathrm{Xe}(\mathrm{g})+2 \mathrm{~F}_{2}(\mathrm{~g}) ightarrow \mathrm{XeF}_{4}(\mathrm{~g})$
  3. $2 \mathrm{CO}(\mathrm{g})+\mathrm{O}_{2}(\mathrm{~g}) ightarrow 2 \mathrm{CO}_{2}(\mathrm{~g})$
  4. $\mathrm{N}_{2}(\mathrm{~g})+\mathrm{O}_{3}(\mathrm{~g}) ightarrow \mathrm{N}_{2} \mathrm{O}_{3}(\mathrm{~g})$

Solution

The reaction given in choice (b) represents either $\Delta_{x} \mathrm{H}^{\circ}$ or $\Delta \mathrm{H}^{\circ}$ .

Asked in: JEE-TOPICTESTS-CHEMISTRY

Practice more THERMODYNAMICS questions on Aicharya