Chemistry-TGhermodynamics Piston Cylinder Device question

[meeklobraca]

Homework Statement

A piston cylinder device with a spring attached initially contains 0.02m^3 of R-134A at 50C. A valve connected to the cylinder is opened and 20kg of R-134A enters the device from a supply line at 800kPa and 80C. The spring is compressed and the piston moves up. The process stops when the pressure inside the cylinder reaches 1MPa, at a temperature of 100C and a volume of 0.6m^3.

a) The quality (x) of the R-134A in state 1?
b) Work done in this process (kJ)?
c) Amount of heat transferred to/from device (kJ)?

Homework Equations

The Attempt at a Solution

Im stuck at the quality aspect of the question. In most piston cylinder devices the volume is constant at least for a little but I think the volume is constantly changing throughout the problem. So I don't know how to get the quality with the information given.

Any help would be appreciated!

 

[chemisttree]

I'm still thinking about "state 1"...

Quality? Perhaps that should be quantity?

 

[meeklobraca]

No, it shouldnt.

 

[chemisttree]

glad it's your problem and not mine!