Question

Assertion : Air quickly leaking out of a balloon becomes cooler.

Answer 1

When a system undergoes a change under the condition that no exchange of heat takes place between the system and surroundings, then such a process is called adiabatic process. The leaking air of balloon undergoes adiabatic expansion. In this expansion, due to work done against external pressure, the internal energy of air reduces. Thus, it becomes cooler.

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