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Two moles of ideal helium gas are in a r...

Two moles of ideal helium gas are in a rubber balloon at `30^@C.` The balloon is fully expandable and can be assumed to require no energy in its expansion. The temperature of the gas in the balloon is slowly changed to `35^@C.` The amount of heat required in raising the temperature is nearly (take R
`=8.31 J//mol.K`)

A

62 J

B

140 J

C

124 J

D

208 J

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The correct Answer is:
D
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