7one lb of refrigerant 134a contained within a piston–cylinder assembly undergoes a process from a state where the temperature is 60f and the refrigerant is saturated liquid to a state where the pressure is 140 lbf/in 2 and quality is 50%. determine the change in specific entropy of the refrigerant, in btu/lbr. can this process be accomplished adiabatically?

Explanation:

A) In order to solve the table it is necessary to consult tables A11-E and A10E for refrigerant R134-a

In this way we obtain that:

In this way,

In this way the entropy change is,

B) Whenever entropy yields a positive result, the process can be carried out adiabatically.

you would expect a sound wave to speed up. - b)

the motion of a pendulum is a classic example of mechanical energy conservation. a pendulum consists of a mass (known as a bob ) attached by a string to a pivot point. as the pendulum moves it sweeps out a circular arc, moving back and forth in a periodic fashion.