Maslow's Hierarchy of Needs. Definition. Maslow's hierarchy of needs is a theory of motivation and personality developed by the psychologist Abraham H. Maslow (1908â1970). Maslow's hierarchy explains human behavior in terms of basic requirements for survival and growth.
When you use ice to cool the ingredients for ice cream, the energy is absorbed from the ingredients and from the outside environment (like your hands, if you are holding the baggie of ice!).
Adding heat to melt ice does not result in a temperature change. Melting 1 gram of ice requires 80 calories. Latent heat of melting Freezing 1 gram of water releases 80 calories. Latent heat of fusion Latent heat is also during evaporation, the process of converting a liquid to a gas. The latent heat of vaporization is the energy absorbed by water during evaporation.