The transfer of energy by heating processes

Question 1

The particles of solids, liquids and gases have different…

Answer 1

Amounts of energy

Question 2

What do all objects absorb and emit?

Answer 2

Infrared radiation

Question 3

The hotter an object is…

Answer 3

The more infrared radiation it radiates in a given time

Question 4

What are dark, matt surfaces good at?

Answer 4

Good absorbers and good emitters of infrared radiation

Question 5

What are light, shiny surfaces bad and good at?

Answer 5

Poor absorbers and poor emitters of infrared radiation

Good at reflectors of infrared radiation

Question 6

What does the kinetic theory explain?

Answer 6

The different states of matter

Question 7

What do all objects emit and absorb?

Answer 7

Infrared radiation

Question 8

The rate at which an object transfers energy by heating depend on:

Answer 8

Surface area and volume
The material from which the object is made
The nature of the surface with which the object is in contract

Question 9

How can temperature increase the rate in which energy is transferred by heat?

Answer 9

The bigger the temperature difference between an object and it’s surroundings, the faster the rate

Question 10

What does the kinetic theory say about solids?

Answer 10

Arrangement of particles
close together
regular pattern

movement of particles
vibrate about a fixed position

They have a fixed shape and cannot flow, this is because the particles cannot move from place to place
They cannot be compressed or squashed, this is because the particles are close together and have no space to move into

Question 11

What does the kinetic theory say about liquids

Answer 11

Arrangement of particles
close together
random

movement of particles
move around each other

They flow and take the shape of their container, this is because the particles can move around each other
They cannot be compressed or squashed, this is because the particles are close together and have no space to move into

Question 12

What does the kinetic theory say about gases?

Answer 12

Arrangement of particles	
         far apart
         random
movement of particles	
	move quickly in any direction

They flow and completely fill their container, this is because the particles can move quickly in all directions
They can be compressed or squashed, this is because the particles are far apart and have space to move into