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JEE MAIN 2020
02-09-2020 S2
Question
The heat of combustion of ethanol into carbon dioxide and water is -327 kcal at constant pressure. The heat evolved (in cal) at constant volume and $27^{\circ} \mathrm{C}$ (if all gases behave ideally) is $\left(\mathrm{R}=2\right.$ cal mol-1 $\left.\mathrm{K}^{-1}\right)$ $\_\_\_\_$ .
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