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70 calories of heat is required to raise...

`70` calories of heat is required to raise the temperature of `2` mole of an ideal gas at constant pressure from `30^@C` to `35^@C` . The amount of heat required to raise the temperature of the same gas through the same range at constant volume is

A

`30 `

B

`50 `

C

`70`

D

`90`

Text Solution

Verified by Experts

The correct Answer is:
B
By using first law
`Delta Q = Delta U + Delta W` at constant value `Delta Q = Delta U, " "70 = Delta U + 2 xx 2xx 5 rArr Delta U = 50 `
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