$10$

A $0\mathrm{.}75m^3$ tank of R$-134$a is initially at $150$ kPa and $40\%$ quality is heated, which results in the final pressure being $550$ kPa $.$ Determine the mass of the refrigerant, the final temperature, and the amount of heat added.

As you should see, the final state will be a superheated vapour and finding $T$ and $u$ will require a double interpolation $($which you did previous with viscosity tables in FMEC $100).$ You are to interpolate the values in two ways and comment on why the values are different.

Interpolate $T$ and $u$ values at $500$ kPa and $600$ kPa based on the specific volume and then interpolate the values based on $550$ kPa $.$

Interpolate $v$ and $u$ values based on $550$ kPa at a few temperatures $($the results from $1$ gives a hint to which temperatures$).$ Then interpolate $T$ and $u$ based on the specific volume.

For the heat added calculation, use results from interpolation $1.$