19 please need help, keep in mind the 7 basic units and watch the sig figs thank you so much. Imagine a "square cycle" where the two isobaric processes occur at 250000 Pa and 860000 Pa, and the two isochoric processes have volumes of 0.05 m^3 and 0.07 m^3. Pressure d Volume If point a has 10000 J of internal energy and point b has 15000 J of internal energy. find Qab , which is the amount of heat necessary to go from point a to point b