Q1. 100g of water that is already at its boiling point, is boiled without any temperature change occurring. If the latent heat of vaporisation of water is 2260000J/kg, how much energy is needed to boil the water completely away?

Pure water boils at 100 ∘ C, has a specific latent heat of vaporisation of 2260kJ/kg and a specific heat capacity of 4200J/(kg ∘ C).Part AEnergy to boil waterAll questions in this part are answered correctlyHow much energy is required for 2.0kg of water to boil away if it is already at 100 ∘ C?

(f)     While a kettle boils, 0.018 kg of water changes to steam.Calculate the amount of energy required for this change.Specific latent heat of vaporisation of water = 2.3 × 10 6 J / kg.

A student measures 250g of water and pours it into a beaker. They heat the water over a Bunsen burner for five minutes, then measure the mass of the water again; this time it is 200g. The specific latent heat of vaporisation of water is 2260kJ/kg.How much energy has been transferred in evaporating the water?

A mass of 0.063 kg of water was turned into steam.The specific latent heat of vaporisation of water is 2 260 000 J/kgCalculate the thermal energy transferred to the water to turn it into steam.Use the equation:thermal energy for a change of state = mass ×specific latent heatEnergy = ___________________________ J

Cold water from a tap is put into a kettle. The temperature of the water increases from 6 °C to its boiling point of 100 °C. Calculate the change in thermal energy when the mass of water heated is 1.5 kg Specific heat capacity = 4200 J/kg °C