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Heat as a form of energy in Transit.
cold object. Thus heat refers to energy that is transferred from one body to
another because of difference in tem- perature. Heat is not the energy that a
body contains in it. It refers to the amount of energy transferred from hot to a
cold body. Once the heat energy is transferred to a body, it is converted in to
the internal energy of the body. The internal energy is the sum of all the micro-
scopic kinetic and potential energies of the molecules in the body. The S.I unit
of heat, as for any form of energy is joule.
11.2. Temperature
If we take two bodies, we can say by the sense of touch whether one is hotter
than the other. It is not pos- sible to determine,how much hotter.it is at a
particular time than the other. We find that it is not possible to de- termine the
degree of hotness by sense of touch. The quantitative determination of the
degree of hotness may be termed as temperature. Before describing the
meas- urement of temperature it is appropriate here to define thermal
equilibrium, when two bodies at different temper- atures are brought in thermal
contact with each other. The heat starts flowing from the hot body to the cold
body till the temperature of the bodies becomes same, then they are said to
be in thermal equilibrium.
Heat as a form of energy in Transit.
cold object. Thus heat refers to energy that is transferred from one body to
another because of difference in tem- perature. Heat is not the energy that a
body contains in it. It refers to the amount of energy transferred from hot to a
cold body. Once the heat energy is transferred to a body, it is converted in to
the internal energy of the body. The internal energy is the sum of all the micro-
scopic kinetic and potential energies of the molecules in the body. The S.I unit
of heat, as for any form of energy is joule.
11.2. Temperature
If we take two bodies, we can say by the sense of touch whether one is hotter
than the other. It is not pos- sible to determine,how much hotter.it is at a
particular time than the other. We find that it is not possible to de- termine the
degree of hotness by sense of touch. The quantitative determination of the
degree of hotness may be termed as temperature. Before describing the
meas- urement of temperature it is appropriate here to define thermal
equilibrium, when two bodies at different temper- atures are brought in thermal
contact with each other. The heat starts flowing from the hot body to the cold
body till the temperature of the bodies becomes same, then they are said to
be in thermal equilibrium.
