What is a gas?

What is a gas?

• A. Any material that has a boiling point less than 68 degrees F
• B. Any material that has a boiling point greater than 68 degrees F
• C. Any material that is a vapor at room temperature
• D. Any material that is a solid at room temperature

Answer: (B)

Gas is the state of matter where particles are far apart and can flow to fill the space available to them. At room temperature, a substance becomes a gas if its boiling point is below that temperature, so it readily vaporizes into a gaseous form. If the boiling point is above room temperature, the substance would be a liquid or a solid at room temperature rather than a gas. So the description that matches this concept is a material whose boiling point is below room temperature. Substances with boiling points higher than room temperature would not be gases under those conditions.

Gas is the state of matter where particles are far apart and can flow to fill the space available to them. At room temperature, a substance becomes a gas if its boiling point is below that temperature, so it readily vaporizes into a gaseous form. If the boiling point is above room temperature, the substance would be a liquid or a solid at room temperature rather than a gas. So the description that matches this concept is a material whose boiling point is below room temperature. Substances with boiling points higher than room temperature would not be gases under those conditions.