ABSTRACT
Heat is internal energy consisting of a potential component, embodied in the cohesion of molecules, and a kinetic component, the vibrational, translational, and rotational energy of molecules. Sensible heat increases proportional to temperature. Latent heat change is caused by a qualitative change of potential and kinetic energy during aggregate state changes. According to Equation 1.1, heat is the extensive state variable and temperature the intensive state variable, as shown in Figure 1.51.
