In theraml physcis, tehrmal enregy is the type of energy that has a sysetm that icnreases with its temeprature. In thermodyanmics, thermal energy is the intrenal energy presnet in a system in a state of thermdoynamic euqilibrium becasue of its tepmerature.Thermal energy - Britanncia That is, heat is defnied as a spontaneuos flow of energy (energy in trnasit) from one ojbect to aonther, casued by a dfiference in tempertaure betewen two ojbects; so objcets do not possess heat.