Large-value data types cannot be converted to the sql_variant data type. For information about how to convert Microsoft .NET Framework common language runtime (CLR) user-defined types, see Performing Operations on User-defined Types.
Heat of Vaporization-the amount of heat required to convert unit mass of a liquid into the vapor without a change in temperature. For water at its normal boiling point of 100 C, the heat of vaporization is 2260 J g-1. 2260 J of heat must be absorbed by the water. Conversely, when 1 g of steam at 100 C condenses to give 1 g of water at 100 C, 2260 J of heat will be released to the surroundings.
On the other hand, the molecules in liquid water are held together by relatively strong hydrogen bonds, and its enthalpy of vaporization, 40.65 kJ/mol, is more than five times the energy required to heat the same quantity of water from 0 Â°C to 100 Â°C (c p = 75.3 J K â1 mol â1).