Use these equations to you answer the questions.

change in thermal energy (j) = mass (kg) x specific heat capacity (j/kg/°c) x
change in temperature (°c)

thermal energy needed for a change of state (j) = mass (kg) x specific latent heat (j/kg)

q1. some students have 100 g of ice. the temperature of the ice
nave 100 g of ice. the temperature of the ice is -4 °c. they need to calculate how much energy
they will need to heat the ice until it is all melted.
first they calculate how much energy is needed to heat the ice to its melting point. write down the equation
they use to do this.

(1 mark)

q2. next they calculate how much energy is needed to melt the ice. write down the equation they use to
do this.

(1 mark)