5. 10 grams of CH an ideal gas has an initial pressure of 9120 mmHg and a temperature of 300 K. At a constant temperature and moles, the gas changes to a final pressure is 1280 mmHg. a) Calculate the initial and final volumes (L) b) Calculate the work done (in J) for the gas volume change if it is carried out against a constant external pressure of 6 atm. (1 L atm = 101.325 J) c) Using answer 5b, is this an exothermic or endothermic process if the heat is equal to +1100 J