What amount of energy is needed to melt 10 kg of copper at a temperature of 13 degrees c = 380 j / kg

What amount of energy is needed to melt 10 kg of copper at a temperature of 13 degrees c = 380 j / kg s specific heat of fusion 330,000 j / kg melting point 1083 s

Given:
m = 10kg,
t1 = 13 ° C,
t2 = 1083 ° C,
c = 380J / (kg * ° С),
λ = 330,000J / kg;
Find Q -?.
The amount of heat is needed to heat copper to the melting temperature – Q1, and to melt copper at this temperature – Q2:
Q = Q1 + Q2,
where
Q1 = m * c * (t2 – t1) = 10 * 380 * (1083 – 13) = 4066000J = 4066kJ;
Q2 = m * λ = 10 * 330000 = 3300000J = 3300kJ;
Q = 4066kJ + 3300kJ = 7366kJ.