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How much heat energy should be added to...

How much heat energy should be added to a mixture of `10 g` of hydrogen and `40 g` of helium to change the temp. by `50^(@)C` kept in a closed vessel? Given `R= 2 cal//mol e K`

A

2500 cal

B

2750 cal

C

2000 cal

D

None of these

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The correct Answer is:
B
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