How much heat is needed to melt 5 kg of ice taken at a temperature of 0 ° C?

To calculate how much heat is needed to melt ice with a mass of m = 5 kg, taken at a melting temperature T = 0 ° C, we use the formula Q = λ • m, where λ = 0.34 MJ / kg = 340,000 J / kg – specific heat of melting of ice. It is taken from reference tables. Let’s substitute the values of physical quantities in the formula and make calculations: Q = 340,000 J / kg • 5 kg; Q = 1,700,000 J = 1.7 MJ.
Answer: to melt a given mass of ice taken at the melting temperature, you need an amount of heat Q = 1.7 MJ.