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70 calories of heat is required to raise...

70 calories of heat is required to raise the temperature of 2 moles of an ideal gas at constant pressure from `40^(@)C` to `45^(@)C` (R=2cal/mol`-.^(@)C`). The gas may be

A

`H_(2)`

B

He

C

`CO_(2)`

D

`NH_(3)`

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The correct Answer is:
A
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