For the reaction, $3 \mathrm{C}_2 \mathrm{H}_{2(\mathrm{~g})} \longrightarrow \mathrm{C}_6…

For the reaction, $3 \mathrm{C}_2 \mathrm{H}_{2(\mathrm{~g})} \longrightarrow \mathrm{C}_6 \mathrm{H}_{6(\mathrm{~g})}$, calculate the standard enthalpy change. The values of $\Delta \mathrm{H}_{\mathrm{f}}$ for $\mathrm{C}_2 \mathrm{H}_2$ and $\mathrm{C}_6 \mathrm{H}_6$ respectively are $250 \mathrm{~kJ} \mathrm{~mol}^{-1}$ and $90 \mathrm{~kJ}^{-1} \mathrm{~mol}^{-1}$.
  1. $+660 \mathrm{~kJ} \cdot \mathrm{mol}^{-1}$
  2. $-260 \mathrm{~kJ} \cdot \mathrm{mol}^{-1}$
  3. $+260 \mathrm{~kJ} \cdot \mathrm{mol}^{-1}$
  4. $-660 \mathrm{~kJ} \cdot \mathrm{mol}^{-1}$

Solution

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Asked in: AP EAMCET 2020 (07 Oct Special)

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