Question

Is it possible to change the temperature and pressure of a fixed mass of a gas, without changing its volume?

Answer 1

1. No, it is not possible to change the temperature and pressure of a fixed mass of gas without changing its volume.
2. Because all the three values are related to each other by the gas equation as

$\frac{\mathrm{PV}}{\mathrm{T}}=K$ (K=constant)

So, if we change any variables in the above equation then automatically the third variable will be changed.