Question

When you touch a vessel on a stove your body feels hot. Why?

(A) Heat energy is transferred from vessel to the body
(B) Heat energy is transferred from the body to the vessel.
(C) Kinetic energy is transferred from vessel to the body
(D) Kinetic energy is transferred from body to the vessel

Answer 1

Hint: When heat transfer occurs, the information about the heat transfer and its effects on the surroundings can be obtained from the thermodynamics two important laws.

 Complete step by step answer:
The heat energy raises the temperature of the object through which it passes. The second law of thermodynamics gives information about the direction in which the heat energy transfers. According to the law, the heat flows from the hotter temperature body towards the lower temperature body, and this process keeps going until the condition of thermal equilibrium arrives.

The stove generates a large amount of heat, which is transferred into the stove, which is kept above it. So, the vessel will gain heat energy, and when anyone touches a vessel on a stove, its body feels hot because the transfer of heat energy will start immediately whenever physical contact occurs with the stove. So when the body comes in contact with the vessel, the heat transfer from the vessel to the body takes place, and due to the effect of heat transfer, the body gains the heat energy from the vessel; thus, the body feels hot.

So, the heat is transferred from the vessel to the body and the “OPTION (A)” is correct.

Note:
The heat energy cannot be transferred from the body to the vessel because the temperature of the body is very less as compared to the temperature of the vessel. So the violation of the second law of thermodynamics will take place if the heat energy transfer from body to vessel occurs.