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When an ideal gas in a cylinder was comp...

When an ideal gas in a cylinder was compreswsed isothermally by a piston, the work done on the gas found to be `1.5xx10^(4)` cal. During this process about

A

`3.6xx10^3` cal of heat flowed out from the gas

B

`3.6xx10^3` cal of heat flowed into the gas

C

`1.5xx10^4` cal of heat flowed into the gas

D

`1.5xx10^4` cal of heat flowed out from the gas

Text Solution

Verified by Experts

The correct Answer is:
A
For isothermal compression, increase of heat which must flow out of the gas -
`Delta Q=Delta U+Delta W implies Delta Q=Delta W`
`Delta Q= -1.5xx10^4 J =(-1.5xx10^4)/(4.18) = -3.6 xx 10^3` cal.
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