When hot water is added to cold water. In which direction does the heat energy move

Question

A. Equivalent amounts of heat energy move in both directions.
B. The heat energy moves from the hot water into the cold water.
C. No heat energy moves, as it all remains in the hot water.
D. The heat energy moves from the cold water into the hot water.

Answer 1

B. The heat energy moves from the hot water into the cold water.

In this scenario, heat transfer occurs from the hot water (higher temperature) to the cold water (lower temperature) until thermal equilibrium is reached, meaning the temperatures equalize.