Certified Hyperbaric Technologist Practice Test

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Which law states that the total pressure exerted by a mixture will increase proportionally as the total pressure increases?

  1. Boyle's Law

  2. Dalton's Law

  3. Charles's Law

  4. Pascal's Law

The correct answer is: Dalton's Law

Dalton's Law is the principle that describes how the total pressure exerted by a mixture of gases is equal to the sum of the partial pressures of each individual gas in that mixture. This means that as the total pressure of the system increases, each gas's partial pressure will also increase proportionally, assuming the temperature and volume remain constant. This law is particularly significant in hyperbaric medicine, where gas mixtures are often used under high-pressure conditions, as it helps explain how different gases behave in such environments. Boyle's Law, on the other hand, focuses on the relationship between pressure and volume of a gas at a constant temperature, stating that pressure decreases as volume increases. Charles's Law relates the volume and temperature of a gas at constant pressure, indicating that volume increases with temperature. Pascal's Law pertains to the transmission of pressure in a fluid at rest and is not applicable in the context of gas mixtures. Thus, Dalton's Law is the most relevant principle for understanding the behavior of gases under varying total pressures.