specific heat capacity and latent heat

How much heat energy is needed to raise the temperature of 2kg of water from 5 °C to 100 °C? The specific heat capacity of water is 4200 J/kg °C.

• 800 kJ

• 700 kJ

• 200 kJ

• 500,000J

How much heat energy is needed to raise the temperature of 400g of Aluminium from 50 °C to 100 °C? The specific heat capacity of Aluminium is 900 J/kg °C.

• 18 kJ

• 20kJ

• 1000J

• 500,000J

SI unit of heat capacity

• J/°C

• J/kg°C

• J/kg

SI unit of Latent heat

• J/kg K

• J/kg

• J

• kJ/kg

A 3 kg block of copper (specific heat capacity = 385 J/kg°C) at 10°C is given 46,200 J of energy. What will be its final temperature?

• 20°C

• 30°C

• 40°C

• 50°C

If the same amount of heat energy were to be provided to a block of twice the mass of the same material, what would happen to the temperature rise?

• doubles

• becomes half

• same

How much energy is needed to melt 160 g of ice at 0°C to water at the same temperature? (Specific latent heat of fusion of water = 334 kJ/kg.)

• 50 kJ

• 53440kJ

• 53.44kJ

• 53.44J

How much water at 100°C would be turned into steam at the same temperature by 6788 kJ of energy? (Specific latent heat of vaporisation of water = 2,260 kJ / kg.)

• 2kg

• 4kg

• 3kg

• 5kg