P1.1.3 Energy Transfer By Heating

Question 1

Explain conduction in a metal

Answer 1

Metals contain delocalised electrons
Gain kinetic energy from heat
Electrons collide an transfer kinetic energy

Question 2

Explain conduction in non-metals

Answer 2

Atoms gain kinetic energy
Vibrate with bigger amplitude
Vibration passed into bigger atoms
Through collisions

Question 3

Explain convection in water

Answer 3

Water molecules gain kinetic energy from heat source
They spread out making liquid less dense
Warm liquid rises

Question 4

What is evaporation

Answer 4

Liquid turning to gas

Question 5

What is condensation is?

Answer 5

Gas changing to a liquid

Question 6

What factors affect condensation and evaporation

Answer 6

The surface area of liquid

Air is moving over surface of liquid

Question 7

Factors affecting rate of energy transfer

Answer 7

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

Question 8

The bigger the temperature difference between and object and it’s surroundings…

Answer 8

The faster the rate at which energy is transferred by heating