HEAT

    HEAT
    HEAT
    Heat is a form of energy and is defined as:
     “The total kinetic energy of all the molecules of a body “
      heat
    SYMBOL
    It is denoted by “Q” or “q”
    UNITS
    (1) Joule

    (2) B.T.U
    (3) Calorie
    CONVERSION
    1 B.T.U = 251.996 Cal ( or 252 Cal)
    1 calorie = 4.186 Joule ( or 4.2 joule)
    FLOW OF HEAT
    Natural flow of heat always takes place from a region of high temperature to a region of lower temperature.
    THERMOMETRIC PROPERTIES
    Properties of a substance that vary uniformly with the variation in temperature are referred to as Thermometric properties. 
    EXAMPLES:
    Volume , Density ,Viscosity , Pressure , Surface Tension , Area
    THERMAL EQUILIBRIUM
    When two bodies at different temperatures are brought into thermal contact , heat flows from hot
    body to cold body till the temperature of both the bodies becomes equal .This state is referred to as THERMAL EQUILIBRIUM.
    TEMPERATURE
    “Average kinetic energy of the molecules of a body is called temperature.”Temperature describes the degree of hotness of a body.