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A cylinder with fixed capacity of 67.2 lit contains helium gas at STP. The amount of heat needed to raise the temperature of the gas by 20°C is :[Given that R = 8.31 J mol–1 K–1 ](1) 748 J (2) 350 J (3) 374 J (4) 700 J |
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Answer» Correct option (1) 748 J Explanation: Q = nCvdT = 748 Joule |
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