the amount of the heat needed for 2 kg of ice at -5 °c if it is heated until all the ice melts is?

Dik : Massa : 2kg
ΔT = 0 -(-5) = 5°C
Ces = 2100 (satuannya lupa)
L = 336.000

Q1 = m.Ces.ΔT
= 2 × 2100 × 5
= 21000 J
Q2 = m × L
= 2 × 336.000
= 672.000 J

Qtot = Q1 + Q2
= 21.000 + 672.000
= 693.000 J

Sekian.