A weighted piston$-$cylinder device is filled with $10$ kg of $R-134$ a measuring $0\mathrm{.}70m^3$ at a pressure of $200$ kPa $.$ The container is now heated until the temperature reaches $30C$ while the piston is free to move.

$2.[5$ points$]$ Determine the initial temperature of the refrigerar

$3.[5$ points$]$ What is the final volume of the cylinder?

$4.[10$ points$]$ Calculate the total enthalpy change of the refrige in kJ $.$