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Thermodynamics 1/2 > Chapter 1 > Flashcards

Chapter 1 Flashcards

1
Q

First law of thermodynamics

A

Conservation of energy principle (cannot be created or destroyed)

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2
Q

Second law of thermodynamics

A

Non-conservation of Exergy (about how and why exergy is destroyed) entropy is inevitable

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3
Q

Third law of thermodynamics

A

The entropy of a PURE CRYSTALINE SUBSTANCE at ABSOLUTE ZERO is 0

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4
Q

The zeroth law of thermodynamics

A

If one part of the system is x-temp the other areas are also x-temp

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5
Q

Intensive Properties

A

Independent of the size of the system

Destiny
Temperature
Pressure

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6
Q

Extensive properties

A

Dependent on the size of the system

Mass
Volume
Total specific energy

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7
Q

Specific gravity/ how to find density

A

Relative density
Funny looking P
Temperature dependent
P=m/V

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8
Q

Pressure and units

A

The force exerted by a fluid in kPa

Pascal=1N/1m^2

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9
Q

Manometer
how to calculate the pressure difference

A

Positive if going with gravity
Negative if going against gravity

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10
Q

“Iso”

A

Something is constant

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11
Q

Thermal equilibrium

A

Temp is constant throughout the system

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12
Q

Mechanical equilibrium

A

The pressure is the same through the system

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13
Q

Phase equilibrium

A

The mass of each phase, in a system with 2 phases is not changing

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14
Q

Chemical equilibrium

A

The chemical composition of the system does not change with time

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15
Q

Isothermal

A

Constant temperature

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16
Q

Isobaric

A

Constant pressure

17
Q

Isochoric

A

Constant volume

18
Q

Isenthalpic

A

Constant enthalpy

19
Q

Isentropic

A

Constant entropy

20
Q

Adiabatic

A

No heat transfer

21
Q

SSSF process

A

Steady state-steady flow

Open system where there are mass flows cross the boundary

22
Q

USUF process

A

Uniform state-uniform flow

Open system where mass if accumulated over time in a system

23
Q

Specific Enthalpy (h)

A

h=u+P*v

u is the fluid internal energy in J/kg
P is the fluid pressure
v is the fluid specific volume in m^3/kg

24
Q

Specific total energy flow (e)

A
25
Q

Saturation temp

A

The temp at which a pure substance changes phase at a given pressure

26
Q

Saturation pressure

A

The pressure in which and substance changes phase at a given temperature

27
Q

Latent heat

A

The amount of energy absorbed or released during a phase change

28
Q

Latent heat of fusion

A

The amount of energy absorbed during melting

29
Q

Latent heat of vaporization

A

The amount of energy absorbed during vaporization

30
Q

Critical point

A

When saturated liquid and saturated vapour states overlap and become identical

31
Q

Triple point

A

The point at which all three phases exist in equilibrium

32
Q

Which charts can be interchanged

A

If no data on compressed liquid

We can treat it as saturated liquid at the given temp

Thermodynamics 1/2 (2 decks)

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