What occurs during the melting process of ice to water?

• A. A change in temperature
• B. The temperature remains constant
• C. A change in pressure
• D. The release of energy

Answer: (B)

During the melting process of ice to water, the temperature remains constant. This is because the process of melting is a phase change that occurs at a specific temperature, known as the melting point, which for ice is 0 degrees Celsius (32 degrees Fahrenheit).

During melting, although heat energy is being added to the system, this energy is used to break the hydrogen bonds between the ice molecules rather than increasing the temperature. As a result, while heat energy is absorbed, the temperature does not rise until all ice has completely melted into water.

In contrast, during other processes, such as heating water from a liquid to a higher temperature, you would observe a change in temperature. Additionally, changes in pressure typically do not significantly influence the melting process of ice under normal atmospheric conditions. Thus, the characteristic of temperature remaining constant during the transition from solid to liquid is a key aspect of the phase change process for ice melting.