Question

two samples of carbon come into contact. a heat transfer will occur between sample a and sample b. what must be true for heat to transfer from sample a to sample b? the average kinetic energy of a is greater than that of b. the average kinetic energy of b is greater than that of a. the average kinetic energy of both samples is equal. the average kinetic energy does not determine the direction of heat transfer.

Explanation:

Heat transfers from higher - energy to lower - energy regions. Higher average kinetic energy means higher temperature in a substance, and heat flows from higher to lower temperature.

Answer:

A. The average kinetic energy of A is greater than that of B.