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zorro
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Homework Statement
Two cylinders A and B fitted with pistons contain equal number of moles of an ideal monoatomic gas at 400K. The piston of A is free to move while that of B is held fixed. Same amount of heat energy is given to the gas in each cylinder. If the rise in temperature of the gas in A is 42K, the rise in temperature of the gas in B is
a)21K
b)35K
c)42K
d)70K
The Attempt at a Solution
Going by the options, the answer should be d) because the entire heat supplied is used to raise the internal energy of the gas in container B where as some part of it is used to do work against the piston in container A (work on expansion). But this is incorrect.