What does Dalton's law of partial pressures state about gases?

Dalton's law of partial pressures states that in a mixture of non-reacting gases, the total pressure exerted is equal to the sum of the partial pressures of each individual gas present in the mixture. Each gas in the mixture exerts pressure independently of the others, as if each gas occupies the entire volume. Therefore, to determine the overall pressure in a gas mixture, you simply add together the pressures that each gas would exert if it were alone in the container.

This principle is fundamental in thermodynamics and is widely applicable in various fields, including engineering and chemistry. Understanding this law allows for the calculation of pressures in mixtures and plays a vital role in processes like gas analysis, reactions involving gases, and systems where gases are involved under varying conditions.