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Heat > Temperature And Heat Transfer > Flashcards

Temperature And Heat Transfer Flashcards

1
Q

Heat is a a form of what?

A

Energy

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2
Q

What is heat measured in ?

A

Joules

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3
Q

How does heat do work ?

A

From transferring from one place to another as a result of temperature differences

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4
Q

How are the molecules arranged in a solid?

A

Orderly manner, speed of oscillation determines the temperature

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5
Q

How are the molecules arranged in a liquid and gas?

A

No orderly arrangement and they move about randomly

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6
Q

What are the three ways heat is transferred ?

A

Conduction
Convection
Radiation

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7
Q

What is conduction ?

A

Transfer of heat between 2 bodies in contact

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8
Q

What is thermal conductivity

A

The efficiency of a material in conducting heat

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9
Q

What is convection

A

Transmitting heat through the movement of heated regions

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10
Q

What is radiation ?

A

Transmission of heat by wave motion between source and receiving body

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11
Q

What is the best surface for reflecting heat?

A

Shiny or light coloured surface

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12
Q

What does the rate of heat transfer depend on?

A

The total surface area of the hot body

The temperature difference between the hot body and surroundings

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13
Q

What is temperature?

A

Measurement of the level of energy of movement

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14
Q

What is the effect of molecules within a liquid

A

Liquid evaporates = gains energy and particles begin moving faster and breaking free

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15
Q

What is the effect on molecules during a liquid

A

When liquid freezes = particles lose energy and they only vibrate it becomes a solid by becoming tightly packed together

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16
Q

Solid to a liquid

A

Melting

17
Q

Liquid to a solid

A

Freezing

18
Q

Liquid to a gas

A

Boiling

19
Q

Gas to a liquid

A

Condensation

20
Q

What is absolute zero

A

-273 degrees Celsius or 0 k

21
Q

What are the fixed points of the Celsius scale

A

0 degrees and 100 degrees

Water freezes and Boils

22
Q

What is STP

A

Standard temperature and pressure

Corresponds to 273K And 0 degrees

23
Q

The choice of liquid for a thermometer depends on?

A 
High boiling point
Low freezing point 
High expansion 
Low volatility 
Clearly visible surface 
Does not wet the container
24
Q

What are the 3 types of thermometers

A

Alcohol in glass
Mercury in glass
Mercury In steel

Heat (3 decks)

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