23. If a Vander-Waal’s gas expands freely, then final temperature is
(a) Less than the initial temperature
(b) Equal to the initial temperature
(c) More than the initial temperature
(d) Less or more than the initial temperature depending on the nature of the gas
Answer-a
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(a) – 5 J (b) – 10 J (c) – 15 J (d) – 20 J Answer-a