A mixture containing hydrogen and oxygen in the ratio of \(2: 1\) by volume is contained in a rigid vessel. This is ignited at \(60{ }^{\circ} \mathrm{C}\) and a pressure of \(1 \mathrm{~atm}(1.013 \mathrm{bar})\), and after some time the temperature is \(2227^{\circ} \mathrm{C}\). Calculate the pressure and the molar composition of the mixture.

[5.13 bar; 96.5\%; 2.36\%; 1.18\%]