specific heat transfer/latent heat

Question 1

decribe thermal energy

Answer 1

thermal energy transfer from hottor to cooler objects and stops when both objects are at the same temperature aka thermal equilibrium

Question 2

what is higher specific heat capacity?

Answer 2

higher specific heat capacity means being able to absorb large amount of heat but temperature would not have much increase

Question 3

energy transfer equation

Answer 3

energy = mass x specific heat capacity x temperature change

Question 4

unit for energy

Answer 4

joules (J)

Question 5

unit for specific heat capacity

Answer 5

J/kg degree celcius

Question 6

what is latent heat?

Answer 6

latent heat is the thermal energy required to change the state of a substance

Question 7

what is specific latent heat of fusion and it formula

Answer 7

specific latent heat of fusion is the amount of energy required to melt 1kg of substance
Q = mlf
Specific latent heat of fusion for water = 333kJ/kg

Question 8

what is specific latent heat of vaporization and its formula

Answer 8

specific latent heat of vaporization is the amount of energy required to vaporise 1kg of liquid to gas
specific latent heat of vaporization for water, 2200kJ/kg at 100 degree celcius
Q = mlv

Question 9

what is the specific heat capacity of water?

Answer 9

4200J/kg degree celcius

Question 10

what is thermal equilibrium?

Answer 10

energy transfers from hotter objects to colder objects and stops at the same temperature. This is called thermal equilibrium

Question 11

which is denser? Water or air?

Answer 11

water

Question 12

which has a higher specific heat capacity?

Answer 12

water or floor?

Question 13

how much energy is reuired to convert 0.2kg of ice to water and raise its temperature to 20dc

Answer 13

ans: 83.4kJ

Question 14

specific heat capacity for water

Answer 14

4200J/kg

Question 15

how much thermal energy is required to convert a 10kg block of ice at 0dc into water at 20dc?

Answer 15

ans: 4160kJ