4.4 When 1 mole of nitrous oxide decomposes into nitrogen and oxygen, the system being at 25 °C and 1 atm both initially and finally, the entropy S of the system increases by 76 J/K and its enthalpy H decreases by 8.2 × 104 J. Calculate the change in the Gibbs free energy in this process.

Comment on the fact that nitrous oxide appears to be stable under these conditions of temperature and pressure.