Question

The lid of a calorimeter minimises heat loss by ______.

Options

• convection

• radiation

Answer 1

The lid of a calorimeter minimises heat loss by convection.

Explanation:

A calorimeter is designed to reduce thermal exchange with the environment. The primary mechanisms of heat loss include conduction, convection, and radiation. The lid covers the upper opening of the calorimeter. This traps the air (or vapour) above the heated liquid, inhibiting its ascent and the influx of cooler air from the environment. The mechanism of heat transmission by fluid motion is termed convection. Therefore, the primary function of the lid is to reduce heat loss through convection.