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