Question 44

Heat transfer by conduction is demonstrated in the situation described.

When a metal spoon sits in a bowl of hot soup, heat is transferred through direct contact between the spoon and the soup, illustrating the process of conduction.

A) conduction

This option is correct because conduction is the transfer of heat through direct contact between materials. In this case, the metal spoon absorbs heat from the hot soup, causing it to warm up as the molecules in the spoon gain energy and vibrate more rapidly.

B) convection

Convection refers to the transfer of heat through the movement of fluids, such as liquids or gases. In this scenario, the heat does not transfer through the movement of the soup itself; instead, it is conducted directly through the spoon. Therefore, this option is incorrect.

C) radiation

Radiation involves the transfer of heat in the form of electromagnetic waves, which does not require a medium. Since the heat transfer in this example occurs through direct contact rather than through waves, radiation is not applicable here, making this option incorrect.

D) diffusion

Diffusion generally refers to the movement of particles from an area of higher concentration to an area of lower concentration and is not a method of heat transfer. Thus, this option does not relate to the heat transfer process occurring with the spoon and soup and is therefore incorrect.

Conclusion

Conduction is the definitive method of heat transfer in this example, as the spoon directly absorbs heat from the soup through contact. The other options fail to describe the process accurately, as they involve different mechanisms of heat transfer that do not apply in this context. Hence, conduction is the only correct answer.