How much energy does it take to melt 4 kg ice at 0 degrees Celsius?

m = 4 kg.
λ = 3.4 * 10 ^ 5 J / kg.
Q -?
The amount of heat Q required to transfer a substance from a solid to a liquid state at the melting temperature is determined by the formula: Q = λ * m, where λ is the specific heat of fusion, m is the mass of the substance.
Q = 3.4 * 10 ^ 5 J / kg * 4 kg = 13.6 * 10 ^ 5 J.
Answer: to melt ice, you need Q = 13.6 * 10 ^ 5 J of thermal energy.