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Thermodynamics > Chapter 3: Monday March 18 2024-Notes > Flashcards

Chapter 3: Monday March 18 2024-Notes Flashcards

1
Q

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

A

Phase

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2
Q

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

A

Pure Substance

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3
Q

Is Water with ice cubes in it a pure substance?

A

Yes

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4
Q

Is water and oil considered to be a pure substance?

A

No

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5
Q

Is alcohol and water a pure substance?

A

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

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6
Q

Guide to describe a system using independent properties

A

State Principle

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7
Q

Only two independent properties are needed to completely describe the system

A

Simple Compressible system

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8
Q

Subset of pure substance

A

Simple compressible system

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9
Q

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

A

Simple compressible system

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10
Q

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

A

Enthalpy (H)

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11
Q

H= V+PV
Is what equation?

A

Enthalpy

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12
Q

What’s Specific Enthalpy’s Equation?

A

H/Mass = h = u+pv

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13
Q

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

A

yes

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14
Q

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

A

T-v is easier to look at

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15
Q

What is a bar unit

A

It means the atmosphere pressure

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16
Q

Having a closed system means what?

A

There is no mass change or change to friction force

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17
Q

p is what unit?

A

Pressure

18
Q

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

A

A

19
Q

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

A

B

20
Q

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

A

C

21
Q

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

A

100% liquid water

22
Q

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

A

Vapor and liquid water

23
Q

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

A

100% vapor

24
Q

A line of constant pressure is called what

A

Isobar

25
Q

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

A

L-f

26
Q

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

A

F-g

27
Q

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

A

G-s

28
Q

What does this symbol mean:

Pc

A

Critical pressure

29
Q

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

A

Always liquid

30
Q

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

A

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

31
Q

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

A

Only vapor

32
Q

What is the curve in the phase change diagram?

A

Saturation curve

33
Q

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

A

L-f

34
Q

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

A

F-g

35
Q

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

A

G-s

36
Q

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

A

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.

37
Q

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

A

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

38
Q

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

A

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

39
Q

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

A

Liquid state

40
Q

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

A

Two phase dome

41
Q

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

A

Vapor state

Thermodynamics (3 decks)

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