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The value of DeltaH for cooling 2 mole o...

The value of `DeltaH` for cooling 2 mole of an ideal monoatomic gas from `225^@C` to `125^@C` at constant pressure will be `C_P = 5/2 R`]

A

250 R

B

-500 R

C

500 R

D

-250 R

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The correct Answer is:
B
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