How many kilocalories are released by freezing 3.1 mol of h2o?

To calculate the kilocalories released by freezing 3.1 moles of H2O, we need to use the heat of fusion for water, which is approximately 6.01 kJ/mol. First, convert this to kilocalories: 6.01 kJ/mol is about 1.43 kcal/mol. For 3.1 moles, the total energy released would be 3.1 mol × 1.43 kcal/mol = 4.43 kcal. Therefore, freezing 3.1 moles of H2O releases approximately 4.43 kilocalories.