A closed system containing a substance undergoes the followi

A closed system containing a substance undergoes the following process:

At state 1, velocity and height are given.

At state 2, velocity, height, pressure and specific volume are given.

During the process, values of heat and electricity are given.

a) Write an energy balance.

b) Find work due to volume change. Is it compression or expansion?

Solution

It is a closed system where heights are given for state 1 and state 2. They can be used to determine the Volume V1 and V2 by keeping cross section area of system constant.

Internal energy ,U is the function of Temperature, T of the system. That is U= mCT

T can be calculated using Gas law, PV=mRT

P (V/m) =RT

V/m is specific volume. And all other variables are given.

Rest is mentioned by you in the comment.