`15 L` of gas at `STP` is subjected to four different conditions of temperature and pressure as shown below. In which case the volume will remain unaffected?

In a process, the pressure of a gas remains constant. If the temperature is doubles, then the change in the volume will be.

In a process, the pressure of a gas remains constant. If the temperature is doubles, then the change in the volume will be.

A quantity of gas occupies an initial volume V_(0) at pressure p_(0) and temperature T_(0) . It expands to a volume V (a) constant temperature and (b) constant pressure. In which case does the gas do more work ?