kinetic theory

Question 1

what is temperature

Answer 1

average kinetic energy per particle

Question 2

what is specific heat capacity

Answer 2

the amount of energy needed to change the temperature of 1kg of a substance by 1 degree

Question 3

what does it mean to have high specific heat capacity

Answer 3

when materials absorb heat without using it (temperature changes slowly)

Question 4

when the temperature is rising what is the energy provided being converted into?

Answer 4

kinetic energy

Question 5

when substance changes state what is the energy provided converted into?

Answer 5

potential energy

Question 6

what happens to temperature during change of state

Answer 6

stays constant

Question 7

REQUIRED PRACTICAL- finding the cooling curve of wax

how would we carry this out?
what are causes of inaccuracy and how can we overcome it?

Answer 7

1. place wax into test tube a
2. create water bath with hot water
3. wait until wax is fully melted
4. remove from water place thermometer in test tube and record temperature every 30 seconds
5. plot a graph

causes of inaccuracy- not all wax melts at the same time avoid by stirring

Question 8

what is specific latent heat

Answer 8

amount of energy needed to change 1kg of a substance’s state

Question 9

what are the 2 types of specific latent heat and what do they mean

Answer 9

specific latent heat of vaporisation
liquid to gas

specific latent heat of fusion
solid to liquid