Question

An iron ball at ${40}^{\circ }C$ is dropped in a mug containing water at ${40}^{\circ }C$. Which of the following is correct?

• A. Temperature of both will increase.
• B. Heat will flow from iron ball to water.
• C. Heat will flow from water to iron ball.
• D. There will be no heat flow.

Answer 1

The correct option is D There will be no heat flow.

Heat always flows from a body at higher temperature to a body at lower temperature.
As both the bodies (iron ball and water) have the same temperature of ${40}^{\circ }C$, no heat will flow between them.