Question: how much energy is required to melt 100g of ice?
Answer: There are energy of heating of ice cube from -4.00 °C till the melting point 0°C – q1 and energy of melting of ice cube to liquid water – q2. Answer: during transition of liquid lead to solid block system lost 134.8 kJ; to melt 100 g of ice the system need 31.7 kJ.