Thermal Transfer Flashcards

You may prefer our related Brainscape-certified flashcards:
1
Q

Where will heat energy move and how long does this last for?

A

From areas of high temperature to areas of low temperature. It continues until the areas are in thermal equilibrium (same temperature)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What are the 4 different ways that thermal energy can transfer?

A

Conduction, convection, infra-red radiation, evaporation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Where can infra-red radiation travel through that other methods of heat transfer can’t?

A

A vacuum

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

How can IR radiation be detected?

A

An infra-red camera

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Which colours show what on an infra-red camera?

A

Blue shows colder areas and red shows hotter areas

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What is IR radiation?

A

An electromagnetic wave

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Where does conduction tend to happen best and why?

A

In solids because the particles are close together

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

How is heat transferred in conduction?

A

By collision of particles

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What temperature would metal feel like?

A

Colder/warmer depending on room temperature

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Why are metals good conductors of heat?

A

They have atoms inside them and lots of free electrons. The free electrons are able to move around and vibrate. Heat energy is passed on by neighbouring electrons vibrating along the metal.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

How is heat energy passed on in a non-metal?

A

By neighbouring particles vibrating along the non-metal. This allows a flow of energy from hot to cold.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Why are most liquids bad conductors?

A

Their particles are not organised and therefore do not transfer heat well as less collision and vibration is occuring

How well did you know this?
1
Not at all
2
3
4
5
Perfectly