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QUESTION NO 47
QUESTION NO 47 XY3, AH i equilibrium, the temperature should be at (l) 500 K (3) 1000 K (2) 750 K (4) 1250 K Three moles of an ideal gas expanded spontaneously into vacuum. The work done will be (1) Infinite (3) 9 joules (2) 3 joules (4) Zero For vaporization of water at 1 atmospheric Pressure, the values of AH and AS are 40.63 kJ (3) 2.

The answer will be 4. Because ideal gas molecules has no intermolecular force of attraction. They can spread spontaneously without consuming energy.
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The answer is 4. because gas expanded into vacuum then the external pressure is zero then work done W = -Pext​(V2-V1) = O
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