"cold" clouds may have both liquid water droplets and frozen particles. other than the bergeron (ice-crystal) process, what other precipitation growth methods are available to cold clouds?

2kg of refrigerant 134a undergoes a polytropic process in a piston-cylinder assembly from an initial state of saturated vapor at 2 bar to a final state of 12 bar, 80 degree c. a)determine the work for the process in kj. b)sketch the process on a p-v diagram.