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?
O The average kinetic energy of A is greater than that of B.
O The average kinetic energy of B is greater than that of A.
O The average kinetic energy of both samples is equal.
The average kinetic energy does not determine the direction of heat transfer.

Answer 1

Heat is transferred from the object with higher average kinetic energy (Sample A) to the one with lower average kinetic energy (Sample B) until thermal equilibrium is achieved.

Step-by-step explanation:

For heat transfer to occur from sample A to sample B, the average kinetic energy of A must be greater than that of B. Heat is the transfer of thermal energy between two bodies at different temperatures. This is because the molecules or atoms in the hotter object will have a higher average kinetic energy, which results in them transferring energy to the molecules or atoms in the colder object upon collisions. As these collisions continue, energy is transferred from the hotter object to the colder one until thermal equilibrium is reached, meaning both objects are at the same temperature, and the net heat transfer rate is zero.