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# One mole of an ideal gas ( y = 1.4 ) is adiabatically compressed so that its temperature rises from $27^{\circ} C \: to \: 35^{\circ}C$. The change in the internal energy of the gas is $(R=8.3\: J \: mol^{-1}K^{-1}$) :

$\begin {array} {1 1} (1)\;-266\: J & \quad (2)\;166\: J \\ (3)\;-268\: J & \quad (4)\;168\: J \end {array}$