A sample of gas is contained in a cylinder-and-piston arrangement.
There is an external pressure of 100 kPa. The gas
undergoes the change in state shown in the drawing.
(b) Now assume that the cylinder and piston are
made up of a thermal conductor such as a metal. During the
state change, the cylinder gets colder to the touch. What is
the sign of q for the state change in this case? Describe the
difference in the state of the system at the end of the process
in the two cases. What can you say about the relative values
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