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One mole of a diatomic ideal gas undergo...

One mole of a diatomic ideal gas undergoes a cyclic process ABC as shown in figure. The process BC is adiabatic. The temperature at A,B and C are 400K, 800K and 600K respectively. Choose the correct statement:

A

The change in internal energy in whole cyclic process is 250 R.

B

The change in internal energy in the process CA is 700 R.

C

The change in internal energy in the process AB is - 350 R.

D

The change in internal energy in the process BC is – 500 R.

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