The answer is -12.81kJ but I cannot arrive at this solution.

I tried using the relationship that pV = k (some constant) then subbing p = k/V into the integral of p with limits v1 and v2, then attempt to solve this integral, but I do not get the right answer.

In general, I am struggling with textbook questions relating to work and energy in my introductory course to thermodynamics already... if someone could point me in the right direction to assist my understanding in this module, that would be greatly appreciated....