Chapter 11-    Energy in Thermal processes

1.  Heat (Q) is energy- the heat needed to change the temperature of a substance  Q = mc DT

     where c is the specific heat capacity of the substance

     Units of heat- Calorie, Kilocalorie, British Thermal Unit (BTU), Joule

     Calorimetry-  In a mixture, heat gained by one part = heat lost by the other part

     Phase change- heat is involved when a solid melts (changes) to a liquid; or when a liquid changes to a vapor phase

     Heat of fusion           Q = mL_{f  ;} L_f is the latent heat of fusion

     Heat of vaporization  Q = mL_v; L_v is the latent heat of vaporization

2. Energy Transfer

    Thermal conduction, convection and radiation