How much heat is required to turn 2 kg ice taken at 0 degrees into water?

The amount of energy required to melt ice is calculated using the formula:
Q = λ * m, where λ is the specific heat of melting of ice (λ = 340 * 10³ J / kg), m is the mass of ice (m = 2 kg).
Let’s calculate the required amount of energy:
Q = λ * m = 340 * 10³ * 2 = 680 * 10³ J = 680 kJ.
Answer: To melt ice, you need to spend 680 kJ of heat.