Question

The Bat Life: In the same example, if somehow, instead of changing the mass on the piston in a single step by a finite value, the mass on the piston was reduced by infinite steps by removing an extremely small mass in each step, which amongst these graphs represent(s) the new process? Remember that through each infinitesimally small change, the temperature remains constant.

• A.
• B.
• C.
• D.

Answer 1

The correct option is B

Since the temperature remains constant, from the ideal gas equation,

PV=NkT=constant
The graph of PV=constant would be a rectangular hyperbola as represented in option (b).