Nitric acid (density: 1,5 g/mL) can dissociate with temperature and pressure. It gets filled in in a pipe with 100 mL capacity and it gets heated up to 300C. It dissociates in H2O, NO and O2. The O2 has at 22C a pressure of 1 atm.

a) Build the reaction equation.

b) How many mL Nitric acid can be filled in to not reach over 50 atm?

c) Which heat quantity Q is needed to heat up the produced gases from 300C to 500C?

d) How much did the Enthalpy and the internal energy change here?

Pls with a bit of explanation. :)