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The temperature of 1 mole helium gas is ...

The temperature of `1` mole helium gas is increased by `1^@C`. Find the increase in internal energy.

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The correct Answer is:
3
`C_(v)=((DeltaU)/(DeltaT))_(v)`
`:. DeltaU=C_(v)xxDeltaT`
`:' C_(v)=3/2R` for monoatomic gas and `DeltaT=1`
`:. DeltaU=3/2R=3/2xx2=3 cal`
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