The more volatile the anesthetic gas is, the higher its vapor pressure is.

• A. True
• B. False
• C. Cannot be determined
• D. Not related

Answer: (A)

The main idea is how volatility relates to vapor pressure. Vapor pressure is the pressure exerted by the vapor of a liquid when it's in equilibrium with the liquid at a given temperature. A substance that is more volatile tends to vaporize more readily, which means more molecules enter the gas phase at that temperature and the vapor pressure is higher. In anesthesia, this relationship explains why more volatile agents have higher vapor pressures, influencing how vaporizers deliver the anesthetic and sometimes requiring special equipment to manage those higher pressures. So, the statement is true.