molecules in solid or liquid or gas gain kinetic energy when heated. why is it like this? I request explanation in details please

  • 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

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

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.