Which of the following describes Dalton's Law? The pressure of a gas is proportional to its volume. The total pressure of a gas mixture is the sum of the partial pressures of each gas in the mixture. The temperature of a gas is proportional to its volume. Only one variable can be changed from an initial state to a final state for a gas.

Dalton's Law, formulated by John Dalton in the early 19th century, revolutionized our understanding of gaseous mixtures. It states that in a mixture of non-reacting gases, each gas contributes to the total pressure independently of the others. This means that if you have a balloon filled with oxygen and nitrogen, you can calculate the total pressure just by adding the pressures exerted by the oxygen and nitrogen alone. How neat is that? In real-world scenarios, Dalton's Law is essential for various applications, such as calculating the behavior of gases in scuba diving, where multiple gases are mixed in the tank. Divers must consider the partial pressures of each gas to avoid issues like nitrogen narcosis or oxygen toxicity. This understanding ensures a safer diving experience and helps divers safely manage their ascent to the surface!