A piston cylinder device contains .85kg of refrigerant-134a at -10°C. The piston is free to move and has a mass of 12 kg and a diameter of 25cm. The local atmospheric pressure is 88 kPa. Now, heat is transferred to refrigerant-134a until the temperature is 15°C. Determine (a) the final pressure, (b) the change in the volume of the cylinder, and (c) the change in the enthalpy of the refrigerant-134a. So far, i managed to calculate the final pressure, which is 90.4kPa. Now, in order to find the change in volume, i am trying to calculate the volume(V) of the initial and final states by using the equation V = vm, where v is the specific volume. My problem is that i am unsure how to find the specific volume (v). Do i use some sort of table or is there a calculation involved? Thanks.