Chapter 3: Monday March 18 2024-Notes

Question 1

A quantity of matter that is uniform throughout in both chemical composition and physical structure

Answer 1

Phase

Question 2

One that is uniformed in chemical composition only. Can have more than 1 phase within it.

Answer 2

Pure Substance

Question 3

Is Water with ice cubes in it a pure substance?

Answer 3

Yes

Question 4

Is water and oil considered to be a pure substance?

Answer 4

No

Question 5

Is alcohol and water a pure substance?

Answer 5

No because it’s has a different chemical composition. Even though they mix together.

Question 6

Guide to describe a system using independent properties

Answer 6

State Principle

Question 7

Only two independent properties are needed to completely describe the system

Answer 7

Simple Compressible system

Question 8

Subset of pure substance

Answer 8

Simple compressible system

Question 9

What is the only mode of work done that’s through a quasi equilibrium pressure-volume work.

Answer 9

Simple compressible system

Question 10

The analyses of internal energy ‘V’ and the product of pressure + volume appears a lot
Or
Heat constant of the system

Answer 10

Enthalpy (H)

Question 11

H= V+PV
Is what equation?

Answer 11

Enthalpy

Question 12

What’s Specific Enthalpy’s Equation?

Answer 12

H/Mass = h = u+pv

Question 13

Does p-v and T-v diagrams have the same shape?

Answer 13

yes

Question 14

Is P-v or T-v diagram easier to look at?

Answer 14

T-v is easier to look at

Question 15

What is a bar unit

Answer 15

It means the atmosphere pressure

Question 16

Having a closed system means what?

Answer 16

There is no mass change or change to friction force

Question 17

p is what unit?

Answer 17

Pressure

Question 18

Starting at 20 degrees C and slowly increasing it’s temperature to 100 degrees C, is which process?

A. L-f
B. F-g
C. G-s

Answer 18

A

Question 19

The temperature is at 100 degrees C and is still heating up which process is this?

A. L-f
B. F-g
C. G-s

Answer 19

B

Question 20

At this point the substances is in a vapor state but is still increasing it’s temperature which process is this?

A. L-f
B. F-g
C. G-s

Answer 20

C

Question 21

When going from l-f what is the substances matter state?

Answer 21

100% liquid water

Question 22

When going from f-g what state of matter is it?

Answer 22

Vapor and liquid water

Question 23

When going from g-s what state of matter is it?

Answer 23

100% vapor

Question 24

A line of constant pressure is called what

Answer 24

Isobar

Question 25

In a T-v diagram: Temp starts at a standard value and goes up and v goes up too til 100 degrees

Answer 25

L-f

Question 26

In a T-v diagram: Temp remains constant, but v goes up creating a phase change

Answer 26

F-g

Question 27

In a T-v diagram: Temp goes up but starting above 100 degrees and v goes up as well

Answer 27

G-s

Question 28

What does this symbol mean: Pc

Answer 28

Critical pressure

Question 29

In either a T-v or a P-v diagram: First region to the left of the critical pressure constants what

Answer 29

Always liquid

Question 30

In either a T-v or a P-v diagram: Underneath the curve and the critical pressure is the second region that contains

Answer 30

A mixture of liquid and vapor Also know as the two phase region

Question 31

In either a T-v or a P-v diagram: The third region is to the right of the critical pressure containing

Answer 31

Only vapor

Question 32

What is the curve in the phase change diagram?

Answer 32

Saturation curve

Question 33

In a P-v diagram: starting at a standard atmospheric value and pressure drops to 2300 Pa but the volume increases A. L-f B. F-g C. G-s

Answer 33

L-f

Question 34

In a P-v diagram: the increase in volume but your not gaining or losing pressure. A. L-f B. F-g C. G-s

Answer 34

F-g

Question 35

In a P-v diagram: Where your at 2300 Pa and you start dropping pressure again and slowly gaining volume. A. L-f B. F-g C. G-s

Answer 35

G-s

Question 36

Does P-valley diagrams deal with a change in temperatures?

Answer 36

Yes, but no. With a single line there is no change in the temperature, but if you add another line there could be another temperature that also doesn’t change.

Question 37

What does f mean in T-v and P-v diagrams?

Answer 37

Saturated liquid state Means that at this point the system contains the max amount of liquid that it can have.

Question 38

What does g mean in both a T-v and a P-v diagram?

Answer 38

Saturated vapor state Means that this is the state where all of the liquid has converted to vapor

Question 39

L-f means what in a T-v or a P-v diagram?

Answer 39

Liquid state

Question 40

F-g means what in T-v and P-v diagrams?

Answer 40

Two phase dome

Question 41

G-s means what in a T-v and a P-v diagram?

Answer 41

Vapor state