Water is initially contained in a piston$-$cylinder assembly at p$1=100$ kPa, v$1=0\mathrm{.}1$ m$3/$kg$,$ V$1=0\mathrm{.}2$ m$3.$ Now, the system temperature increases up to T$2=160$degree straight C$.$ The pressure inside the

cylinder remains constant. Kinetic and potential energy change can be ignored.

What is the initial temperature, T$1,$ in degree straight C$?$