Heat always flows spontaneously from an object with a higher temp. to an obj. with lower temp. Is this the?

Question

same thing as saying that heat always flows from an object with greater internal energy to one with a lower internal energy? Explain.

Answer 1

basically correct  but

second law of thermodynamics.

very complex see the link below.

Answer 2

When I took Physics, back in the Paleozoic era, heat flowed from the higher temperature to the lower temperature. 'Downhill' for short. Always. That's not quite the same as average internal energy, and I suspect that computed quantities like averages don't operate in the existential world.

Temperature is more accurately described as the energy of Brownian motion of the molecules in the substance. Heat flows from hot to cold because momentum can't be transferred from a slower body to a faster one, i.e. the faster one slows down, the slower one speeds up.

That'll be two cents, please.

Answer 3

Temperature is a measure of the average kinetic energy of the particles in the object.  Internal energy is the total energy of the particles in the object.  It is not the same then, as it is possible to have objects at a high temperature with low internal energy (eg a spark) and another object at a low temperature but with high internal energy by virtue of its large size ( a bath of warm water)  Energy will flow from the object with the highest AVERAGE internal energy to one with a lower average internal energy.