Which law of thermodynamics provides the definition of temperature?

If a gas expands at constant temperature and pressure,then its:

The pressure of a gas is $100 \ kPa$. If it is compressed from $1 \ m^{3}$ to $10 \ dm^{3}$,find the work done. (in $J$)

Give examples of intensive properties.

In thermodynamics,a process is called reversible when

Find the work done on $2 \ mol$ of an ideal gas at $27^{\circ} C$ if it is compressed reversibly and isothermally from $5.05 \times 10^6 \ Nm^{-2}$ to $1.01 \times 10^5 \ Nm^{-2}$ pressure. (in $kJ$)