Question

A piece of iron at 25 °C is dropped into a glass of water at 15 °C. Which statement is correct? (4 points)

a Heat will flow from the iron to the water in the glass until both reach the same temperature.
b Heat will flow from the water in the glass to the iron until both reach the same temperature.
c The final temperature of the water in the glass and the iron will be 25 °C.
d The final temperature of the water in the glass and the iron will be 15 °C.

Answer 1

When a piece of iron that is 25 °C is dropped into water that is 15 °C, the heat from the iron will dissipate into the water until the temperature is the same by conduction. Thus, option A is correct.

What is conduction?

Conduction is the transfer of the dissipated energy from the hot iron metal at 25 °C to the water at a lower temperature. The heat or the energy molecules gets transferred from the region of high to lower temperature.

This occurs through the diffusion that allows the hot iron to release the energy from its body that diffuses and gets transferred to the water molecules that have a tempearture of 15 °C, which is lower than that of the iron.

Therefore, the piece of the iron loses its heat to the water till both have the same tempearture.