What is the formula associated with Guy-Lussac's Law?

Guy-Lussac's Law describes the relationship between the pressure and temperature of a gas when the volume is held constant. The law states that the pressure of a gas is directly proportional to its absolute temperature (measured in Kelvin). This relationship can be mathematically expressed in the form of the formula where the initial pressure divided by the initial temperature equals the final pressure divided by the final temperature. This means that as the temperature increases, so does the pressure, provided that the volume of the gas remains unchanged.

Other formulas listed pertain to different gas laws or principles. For example, the formula that sums pressures (the second choice) represents Dalton's Law of Partial Pressures, while the formula relating volume and temperature (the third option) is part of Charles's Law. The fourth option represents Boyle's Law, which involves the relationship between pressure and volume at constant temperature. Understanding the specific implications and conditions of each gas law is crucial in physics and chemistry.