Question

Wall at 40 degree celsius is dropped in a mug containing water at 40 degree celsius what will be the direction of heat

Answer 1

Explanation:

there will be no any heat exchange, between water & wall. since both are at same temperature i.e 40℃. heat exchange requires a temperature difference.

Answer 2

Answer:

see below

Explanation:

the direction of heat transfer is from high temperature to low temperature until thermal equilibrium is established. hence there is net flow of heat in the given example