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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

Text Solution

Verified by Experts

The correct Answer is:
D
For cyclic process, `DeltaU= 0`
`DeltaU_(BC) = nC_VDeltaT = 1xx (5R)/2 xxDeltaT`
`DeltaU_(BC) =1 xx5/2 R(-200) =-500R`
`DeltaU_(AB) =1xx5/2 xxR(400) = 1000R`
`DeltaU_(CA) = 1xx 5/2R(-200) =-500R.`
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