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Calculate the total energy required
to change 0.5 kg of ice at -15 °C
into steam at 100 °C.
You need to do five calculations!!
Energy required to heat up the ice to melting point
(Eh = cmAT)
■ Energy to melt the ice (E₁ = mlf)
■ Energy to heat the water to boiling point (Eh = cmAT)
■ Energy to turn the water into steam (E₁ = ml₁)
■ Add these together to find the total energy required.

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