Question

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

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

Answer 1

When a piece of iron at 25 degrees Celcius is dropped into a glass of water, whose temperature is 15 degrees Celcius, the heat will flow from the iron to the water in the glass until both reach the same temperature. This is because the one that is warmer would release more energy to the colder one.

Answer: Heat will flow from the iron to the water in the glass until both reach the same temperature

Credit to: @Samuelkenobi11