What happens to the temperature of water when heat is transferred to it?

• A. The temperature of the water remains constant
• B. The temperature of the water rises
• C. The temperature of the water decreases
• D. The temperature of the water fluctuates

Answer: (B)

When heat is transferred to water, the temperature of the water rises. This occurs because the added energy from the heat transfer increases the kinetic energy of the water molecules, causing them to move more rapidly. As a result, the average temperature of the water increases.

This principle is grounded in the basic understanding of thermodynamics, where temperature is a measure of the thermal energy within a substance. In the case of water, when it absorbs heat, the temperature increases until it possibly reaches a boiling point or a new equilibrium is established.

In contrast, the options regarding constant temperature, temperature decrease, and fluctuations do not align with the principle of heat transfer. When heat flows into a substance like water, it does not stay the same (constant) or decrease; instead, it consistently leads to an increase in temperature unless there are phase changes occurring, such as melting or boiling, where energy is used for changing states rather than raising temperature. However, during the initial heating process, an increase in temperature is observed as heat is added.