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List I describes thermodynamic processes in four different systems. List II gives the magnitudes (either exactly or as a close approximation) of possible changes in the internal energy of the system due to the process. List-I List-II (I) 10 –3 kg of water at 100°C is converted to steam at the same temperature, at a pressure of 10 5 Pa. The volume of the system changes from 10 –6 m 3 to 10 –3 m 3 in the process. Latent heat of water = 2250 kJ/kg. (P) 2 kJ (II) 0.2 moles of a rigid diatomic ideal gas with volume V at temperature 500 K undergoes an isobaric expansion to volume 3 V. Assume R = 8.0 J mol –1 K –1 . (Q) 7 kJ (III) One mole of a monatomic ideal gas is compressed adiabatically from volume V = 3 1 m 3 and pressure 2 kPa to volume 8 V . (R) 4 kJ (IV) Three moles of a diatomic ideal gas whose molecules can vibrate, is given 9 kJ of heat and undergoes isobaric expansion. (S) 5 kJ (T) 3 kJ CAREER POINT Kota H.O. : Career Point Ltd., CP Tower, IPIA, Road No.1, Kota (Raj.), Ph: 080-47250011 www.careerpoint.ac.in 8 Paper-1 Which one of the following options is correct?

1. I → T, II → R, III → S, IV → Q
2. I → S, II → P, III → T, IV → P
3. I → P, II → R, III → T, IV → Q
4. I → Q, II → R, III → S, IV → T

Correct answer: I → P, II → R, III → T, IV → Q

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