How much heat energy is needed to heat oxygen, mass=10g which is on temperature t=27°C to make the volume go up by 3 times while pressure is constant, and after that increase the pressure 2 times while volume is constant. Specific heat capacity of oxygen is cp= 908 J/KgK and cv=653 J/kgK.
The Attempt at a Solution
I tried and tried and triiied and i hate to come here to look for an answer its a probably an easy one, but i have a mental blockade, can't think of anything.
I have final result Q=11,32kJ if it helps(solution to this from my book)
I simply cannot find any relation or equation so that i can relate pressure and volume etc. I know general fomula Q=U+pV, but that didn't get me anywhere..