A cylinder of fixed capacity (of 44.8 L) contains 2 moles of helium gas at STP .What is the amount of heat needed to raise the temperature of the gas in the cylinder by `20^(@)C` ? `("Use"R=8.31J"mol"^(-1)K^(-1))`A. 996 JB. 831 JC. 498 JD. 374 J

A cylinder of fixed capacity (of 44.8 L) contains 2 moles of helium ga

1.	A cylinder of fixed capacity (of 44.8 L) contains 2 moles of helium gas at STP .What is the amount of heat needed to raise the temperature of the gas in the cylinder by `20^(@)C` ? `("Use"R=8.31J"mol"^(-1)K^(-1))`A. 996 JB. 831 JC. 498 JD. 374 J
Answer» Correct Answer - C Since , the volume of cylinder is fixed and helium is a monoatomic gas. The internal energy = `muCvDeltaT` `U=(1)/(2)fmuRDeltaT" " [thereforeC_(v)=(1)/(2)fR]` `U=(1)/(2)xx3xx2xx8.31xx20=20=498.6J` Carnot Engine and Refrigerator

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A cylinder of fixed capacity (of 44.8 L) contains 2 moles of helium gas at STP .What is the amount of heat needed to raise the temperature of the gas in the cylinder by `20^(@)C` ? `("Use"R=8.31J"mol"^(-1)K^(-1))`A. 996 JB. 831 JC. 498 JD. 374 J

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