The internal energy change (in J)... | Thermodynamics | JEE Main 2020

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JEE MAIN 2020

02-09-20 S1

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The internal energy change (in J ) when 90 g of water undergoes complete evaporation at $100^{\circ} \mathrm{C}$ is $\_\_\_\_$ . (Given : $\Delta \mathrm{H}_{\text {vap }}$ for water at $373 \mathrm{~K}=41 \mathrm{~kJ} / \mathrm{mol}, \mathrm{R}= \left.8.314 \mathrm{JK}^{-1} \mathrm{~mol}^{-1}\right)$

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