A cylinder is in thermal equilibrium with the gas that it contains. The cylinder is then placed in a water bath. If the temperature of the water is observed to increase, which of the following statements is correct regarding the gas and the cylinder?
(A) Q<0 , W=0, and U<0
(B) Q>0 , W<0, and U=0
(C) Q<0 , W>0, and U=0
(D) Q>0 , W=0, and U>0
(E) Q=0 , W<0, and U<0
Option (A) is correct, Because here heat is lost to the water Q 0 ( negative i. e heat is decreasing )
*Volume of gas in cylinder remain constant
i. e V=0
W= 0
* since heat is released by cylinder so internal energy is decreasing U0
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