Docstoc

HEAT

Document Sample
HEAT Powered By Docstoc
					HEAT
HEAT

Heat is a form of energy and is defined as:
                                  "The total kinetic energy of all the molecules of a body "

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.

				
DOCUMENT INFO
Shared By:
Tags: HEAT
Stats:
views:10
posted:11/13/2011
language:English
pages:1