Agas contained within a piston-cylinder undergoes the follow change in states: process 1: constant volume from p1 = 1 bar v1 = 2.6 m3 to state 2 with p2 = 2.7 bar process 2: compression to v3 = 1.5 m3, which the pressure-volume relationship is pv = constant. process 3: constant pressure to state 4, where v4 = 0.5 m3. sketch the processes on p-v graph and evaluate the work for each process in kj.

Process 1:W=0

Process 2:W= -386.13 KJ  

Process 3:W= -468 KJ

Explanation:

Process 1:

Process 2:

Process 3:

Process 1:

    Work (W)=0  ,because it is constant volume process.

Process 2:

It is constant temperature process so PV=C

bar

So work in constant  temperature process

W=

W=    (1 bar=100KPa)

W= -386.13 KJ  

Negative sign means it is compression process.

Process 3:

It is a constant pressure.

So work W=

W=468(0.5-1.5) KJ

W= -468 KJ

Negative sign means it is compression process.

it was a fall down when it happens

explanation:

the equation above shows how temperature f, measured in degrees fahrenheit, relates to a temperature c, measured in degrees celsius. based on the equation, which of the following must be true?

a temperature increase of 1 degree fahrenheit is equivalent to a temperature increase of

5

9

degree celsius.

a temperature increase of 1 degree celsius is equivalent to a temperature increase of 1.8 degrees fahrenheit.

a temperature increase of

5

9

degree fahrenheit is equivalent to a temperature increase of 1 degree celsius.

a) i only

b) ii only

c) iii only

d) i and ii only