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A cylinder of fixed capacity 44.8 litres contain helium gas at standard pressure and temperature.

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A cylinder of fixed capacity 44.8 litres contain helium gas at standard pressure and temperature. What is the amount of heat needed to raise the temperature of the gas by 15°C? (R = 8.31 J mol-1 K-1 )

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Volume of 1 mole of He at STP = 22.4 litres 

Total volume of He at STP = 44.8 litres

Molar specific heat of He (monoatomic gas) at constant volume,

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