2.24 Carbon dioxide (CO2) gas in a piston-cylinder assembly undergoes three processes in series that begin and end at the same state (a cycle). Process 1-2: Expansion from state 1 where p1 = 10 bar, V1 = 1 m3, to state 2 where V2 = 4 m3. During the process, pressure and pV1.5 volume are related by = constant. Process 2-3: Constant volume heating to state 3 where p3 = 10 bar. Process 3-1: Constant pressure compression to state 1. Sketch the processes on p –V coordinates and evaluate the work for each process, in kJ. What is the net work for the cycle, in kJ?

Explanation:

Given that:

From process 1 → 2

Process 2 → 3

The volume is constant i.e

Process 3 → 1

P = constant  i.e the compression from state 1

Now, to start with 1 → 2

The work-done for the process  1 → 2 through adiabatic expansion is:

We know that 1 bar =

∴

For process 2 → 3

Since V is constant

Thus:

W = PΔV = 0

For process 3 → 1

W = PΔV

The net work-done now  for the entire system is :

The sketch of the processes on p -V coordinates can be found in the image attached below.

the correct answer is c.stops after infancy and childhood.

myelin is the substance of the central nervous system (cns) that insulates nerve cell axons to increase the speed at which nerve impulse travels. myelination is a process of myelin formation. this process occurs postnatally, begins in the embryo during the midst of early development and finishes after birth.