Five moles of an ideal gas at \( 293 \mathrm{~K} \) is expanded isothermally from an initial pre...

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Five moles of an ideal gas at \( 293 \mathrm{~K} \) is expanded isothermally from an initial pressure of \( 2.1 \mathrm{MPa} \) to \( 1.3 \mathrm{MPa} \) against at constant external pressure 4.3 \( \mathrm{MPa} \). The heat transferred in this process is \( \mathrm{kJ} \mathrm{mol}^{-1} \). \( \left(\right. \) Use \( \mathrm{R}=8.314 \mathrm{~J} \mathrm{~mol}^{-1} \mathrm{~K}^{-1} \) ]
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