Gas Laws I

STP Standard Temperature and Pressure 0⁰C 1atm

Boyle’s Law Volume is inversely proportional to pressure if mass and temperature are constant All units must be the same on both sides of the equation. It doesn’t matter what units are used V1P1=V2P2

If a sample of oxygen has a volume of 350. 0 mL when its pressure is 0 If a sample of oxygen has a volume of 350.0 mL when its pressure is 0.847atm. What will the volume of the gas be at a pressure of 0.987atm if temperature remains constant?

A gas has a pressure of 1. 06atm and a volume of 6. 14L A gas has a pressure of 1.06atm and a volume of 6.14L. If the gas is compressed to a volume of 1.93L, what will its new pressure be?

Charles’ Law Volume and the Kelvin temperature are directly related when pressure and mass are constant Remember to change all temperatures to Kelvin K= 273 + ⁰C Volume units must be the same on both sides of the equation

A sample of Ne gas occupies a volume of 750. mL at 25. 0⁰C A sample of Ne gas occupies a volume of 750. mL at 25.0⁰C. What volume will it occupy at 50.0⁰C if the pressure is constant?

A gas at 65. 0⁰C occupies 4. 22L of space A gas at 65.0⁰C occupies 4.22L of space. At what Celsius temperature will the volume be 3.87L assuming the same pressure?

Gay-Lussac’s Law Pressure is directly proportional to the Kelvin temperature if the gas has constant mass and volume All temperatures must be in Kelvin Pressure units must be the same on both sides of the equation

At 110. 0⁰C the pressure of a sample of N2 gas is 1. 17atm At 110.0⁰C the pressure of a sample of N2 gas is 1.17atm. What will the pressure be at 215.0⁰C assuming constant volume?

A sample of He gas has a pressure of 1. 25atm at 32⁰C A sample of He gas has a pressure of 1.25atm at 32⁰C. At what temperature will the He reach a pressure of 2.00atm?

Combined Gas Law Relates volume, temperature, and pressure for a sample of gas Allows for changes in more than one variable Units must be the same on both sides of the equation All temperatures must be Kelvin

A helium-filled balloon has a volume of 55. 0 L at 22. 0°C and 1 A helium-filled balloon has a volume of 55.0 L at 22.0°C and 1.08 atm. What volume will it have at 0.955 atm and 15.0°C?

A sample of He in a balloon out in the yard has a pressure of 2atm, at 25⁰C, and a volume of 1.2L. If the balloon is put in the freezer and the volume changes to 1.0L and the pressure reads 1.9L, what is the temperature in the freezer?