Question: how much energy is required for 1 g of water to melt?
Answer: If 1 g of water is given 2 calories, its temperature will go up 2 degrees. Melting ice at 0 degrees Celsius: It takes 80 calories to melt 1 gram of ice. If 1 g of ice (at 0 degrees Celsius) is given 80 calories, it will melt and the final temperature of the water will be 0.