When an ideal gas in a cylinder was compressed isothermally by a piston, the work done on the gas was found to be 1.5×104 joules. During this process about
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a
3.6×103cal of heat flowed out from the gas
b
3.6×103cal of heat flowed into the gas
c
1.5×104cal of heat flowed into the gas
d
1.5×104cal of heat flowed out from the gas
answer is A.
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Detailed Solution
In isothermal compression, there is always an increase of heat. which must flow out the gas.ΔQ=ΔU+ΔW⇒ΔQ=ΔW (∵ΔU=0)⇒ΔQ=−1.5×104J=1.5×104418cal=−3.6×103cal