What is the term for the temperature at which a liquid turns into a gas?

• A. Melting point
• B. Freezing point
• C. Boiling point
• D. Condensation point

Answer: (C)

The term for the temperature at which a liquid turns into a gas is known as the boiling point. At this specific temperature, the vapor pressure of the liquid equals the external pressure surrounding the liquid, allowing bubbles of gas to form within the liquid. When a substance reaches its boiling point, it undergoes a phase change from liquid to gas, which occurs throughout the entire volume of the liquid.

Understanding this concept is crucial in various scientific applications, including cooking, industrial processes, and understanding weather phenomena. The relationships between temperature, pressure, and phase changes are fundamental in thermodynamics and material science, illustrating how substances behave under different conditions. This knowledge also helps in practical everyday situations, such as knowing the boiling point of water for cooking or for processes in laboratories.