For questions about heat - a form of transfer of energy from one body to another or from one body to its surroundings. Also see these tags: [thermodynamics], [enthalpy], [energy], [temperature].

Heat is a form to transfer energy from one body to another or from one body to its surroundings. It is closely connected to (), , , change in the state of matter, .

For example, the transfer of heat, i.e. heating, may cause the temperature of a system to rise.

Heating may also result in a change of the state of matter:

  • melting: $\ce{H2O_{(s)} (ice) ->[\Delta T] H2O_{(l)} (water)}$ (see also )
  • : $\ce{CO2_{(s)} ->[\Delta T] CO2_{(g)}}$
  • boiling: $\ce{W_{(l)} ->[\Delta T] W_{(g)}}$ (see also , here $\approx 6200~\mathrm{K}$)

The symbol of heat is $q$ or $Q$ and it is usually measured in joule $\mathrm{J}$.

history | excerpt history