Chemistry – Gas Laws Practice Test

The combined gas law equation is represented by the expression where the initial pressure, volume, and temperature of a gas (P1, V1, T1) are related to its final pressure, volume, and temperature (P2, V2, T2). This law effectively combines Boyle’s Law, Charles’s Law, and Gay-Lussac's Law into a single formula, demonstrating how these variables interact in a closed system where the amount of gas remains constant.

The form (P1V1)/T1 = (P2V2)/T2 reveals that the product of pressure and volume divided by temperature remains constant. This reflects the direct relationships between the quantities: if one of the factors changes, the others will adjust in response to maintain the balance, assuming the quantity of gas does not change. This equation is instrumental in solving real-world problems involving gas behavior under varying conditions, as it allows for manipulations and calculations of one variable while keeping the others constant.

So, when considering the context of gas laws, this equation succinctly captures how pressure, volume, and temperature correlate, making it the correct representation of the combined gas law.