Compressed air in the tube of a bicycle wheel | vedclass

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Question

(C) When compressed air escapes suddenly from a puncture,the process is adiabatic because the expansion happens very quickly,allowing no time for heat

Vedclass · Accepted Answer

Starts becoming cooler

Vedclass · Answer

(C) When compressed air escapes suddenly from a puncture,the process is adiabatic because the expansion happens very quickly,allowing no time for heat exchange with the surroundings $(dQ = 0)$. According to the first law of thermodynamics,$dU = dQ - dW$. Since the gas does work $(dW > 0)$ in expanding against the external atmosphere,the internal energy $(dU)$ decreases. As the internal energy of an ideal gas is directly proportional to its temperature,the temperature of the air inside the tube decreases.

Compressed air in the tube of a bicycle wheel at normal temperature suddenly starts coming out from a puncture. The air inside:

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