What is the minimum temperature at which a solid melts to become liquid at the atmospheric pressure known as?
Show answer & explanation
Correct answer: B
Explanation
Correct Answer: Option 2: Melting Point
Explanation:
The lowest temperature at which a solid melts to form a liquid at atmospheric pressure is called its melting point. For example, the melting point of ice is 0o273.15K This process represents a change in the state of matter where the particles of a solid gain sufficient energy to leave their fixed state.
Additional Facts: Boiling Point: The temperature at which a liquid boils into a gas at atmospheric pressure (e.g., 100 ⁰C for water). Evaporation: The process in which a liquid changes to vapor at a temperature below its boiling point.
Latent Heat of Fusion: The thermal energy required to convert 1 kg of a solid to a liquid at its melting point at atmospheric pressure.
Possible questions for the upcoming exam:
What is the melting point of ice on the Kelvin scale?
(Answer: 0o273.15K).
What effect does adding impurities have on the melting point of a solid?
(Answer: The melting point decreases).
What is the process of changing directly from a solid to a gas called?
(Answer: Sublimation).