molecules in solid or liquid or gas gain kinetic energy when heated. why is it like this? I request explanation in details please
$\begingroup$
$\endgroup$
3
-
1$\begingroup$ Kinetic energy of molecules is heat. Why the molecules gain heat when heated, really? $\endgroup$ – Ivan Neretin Jan 10 '17 at 22:33
-
$\begingroup$ Though this question may seem simple or self explanatory to many, I try to support others in their curiosity :) $\endgroup$ – Ciambro Jan 31 '17 at 0:57
-
$\begingroup$ @IvanNeretin, kinetic energy of molecules together with their potential energy is internal energy, heat is one of the means of changing this energy. $\endgroup$ – Wildcat Jan 31 '17 at 10:18
Add a comment
|
$\begingroup$
$\endgroup$
2
Heat is a form of kinetic energy. Thus, the heating of a molecule is simply the transfer of energy from the heat source to the molecular bonds and electrons.
-
$\begingroup$ I would be careful in calling heat "a form of energy". It is one of the two means of energy transfer for the case of a closed thermodynamic system (with another one being work). Or, the amount of energy spontaneously flowing from/to a closed system due to a temperature difference between the system and it surroundings by means other than through work. $\endgroup$ – Wildcat Jan 31 '17 at 10:07
-
$\begingroup$ Then, transferring heat changes internal energy of a system, which, in fact, is the sum of the kinetic and potential energies of the particles that form the system. $\endgroup$ – Wildcat Jan 31 '17 at 10:13
