Question

Calculate the amount of energy in calories that is needed to melt 45g of ice at -20°C and then increase the temperature to 95°C
q for ice at -20 to ice at 0.
q = mass x specific heat ice x delta T (dT = 20).

q to melt the ice is
q = mass ice x heat fusion.

q to heat from zero to 95.
q = mass H2O x specific heat H2O x dT and dT = 95.
Then sum the q values.

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