4. Two identical containers A and B with frictionless pistons contain the same ideal gas at the same temperature and the same volume V.
The mass of the gas in A is mB and that in B is . The gas in each cylinder is now allowed to expand isothermally to the same final volume 2V. The changes in the pressure in A and B are found to be ΔP and 1.5 ΔP respectively. Then
(a) 4mA = 9mB (b) 2mA = 3mB
(c) 3mA = 2mB (d) 9mA = 3mB
Ans. c
(12)
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(a) – 5 J (b) – 10 J (c) – 15 J (d) – 20 J Answer-a (123)