Calculate the value of mechanical equivalent of heat from the follo...

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Calculate the value of mechanical equivalent of heat from the following data. Specific heat capacity of air at constant volume and at constant pressure are \( 4.93 \mathrm{cal} / \mathrm{mol}-\mathrm{K} \) and \( 6.90 \mathrm{cal} / \mathrm{mol}-\mathrm{K} \) respectively.
\( \mathrm{P} \) Gas constant \( \mathrm{R}=8.3 \mathrm{~J} / \mathrm{mol}-\mathrm{K} \)

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