How many kcal are needed to melt 140 g of ice?

To melt ice, the heat required is calculated using the latent heat of fusion, which is approximately 334 kJ/kg for ice. To find the energy needed to melt 140 g of ice, you can convert grams to kilograms (140 g = 0.14 kg) and multiply by the latent heat: 0.14 kg × 334 kJ/kg = 46.76 kJ. Since 1 kJ is equal to 0.239 kcal, you can convert this to kcal: 46.76 kJ × 0.239 = about 11.2 kcal. Therefore, approximately 11.2 kcal are needed to melt 140 g of ice.