One mole of a diatomic ideal gas undergoes a cyclic process $ABC$ as shown in figure. The process $BC$ is adiabatic. The temperatures at $A, B$ and $C$ are $400\ K, 800\ K $ and $600\ K$ respectively. Choose the correct statement
JEE MAIN 2014, Easy
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In cyclic process, change in total internal energy is zero.
$\Delta {U_{cyclic}} = 0$
$\Delta {U_{BC}} = n{C_v}\Delta T = 1 \times \frac{{5R}}{2}\Delta T$
$Where,{C_v} = molar\,specific\,heat\,at\,constant\,volume.$
$For\,BC,\Delta T = - 200K$
$\therefore \,\,\Delta {U_{BC}} = - 500R$
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