A gas enclosed in a cylinder by means of a piston that can move without friction is heated so that the increase in the internal energy of the gas is 1500 J.Assuming that the volume of the gas is constant,the heat that entered the gas is

Question

Quizplus · Accepted Answer

According to the first law of thermodynamics, the change in internal energy (ΔU) of a system is equal to the heat added (Q) minus the work done (W) on or by the system. In this case, because the volume is constant, there is no work done (W=0), so ΔU = Q. Thus, the heat that entered the gas is equal to the increase in internal energy, which is 1500 J. Therefore, the correct choice is A, 1500 J.

A Gas Enclosed in a Cylinder by Means of a Piston