If heat is a consequence of particle motion, why does stirring liquids decrease their temperature?

Question

If heat is a consequence of particle motion, why does stirring liquids decrease their temperature?

In: Physics

Answer 1

Heat is a value proportional to the kinetic energy of the molecules with respect to the degrees of freedom of the molecules. In other words, throwing a block of ice will not heat it up, because the kinetic energy of the molecules is all traveling in the plane of freedom, however when ice molecules move against the crystal lattice and begin to break free, that is heating up. Stirring a liquid increases the surface area which allows better heat transfer between the liquid and the other heat sinks in the system.