By: Josie Reed, Michelle Kniffin, Amanda Jarosik and Cydney Washington Gay-Lussac’s Law By: Josie Reed, Michelle Kniffin, Amanda Jarosik and Cydney Washington

What is Gay-Lussac’s law? Discovered by Charles and Joseph Gay-Lussac In the early 1800s. Charles had done the original work for the theory, but the law was verified by Gay-Lussac. This law explains the relationship between pressure and temperature when volume and amount are held constant. Meaning that for any given mass, at a constant pressure, the volume is directly proportional to the temperature. Therefore: If the temperature of a container is increased, the pressure increases. If the temperature of a container is decreased, the pressure decreases.

What is Gay-Lussac’s Law Continued How it was proven Joseph Gay-Lussac created a hot-air balloon that went to a height of 6.4 kilometers. He wanted to collect samples of air from different altitudes for analysis of the differences in temperature, pressure, and humidity. In the next year he came to the conclusion that the earth's atmosphere does not change in composition with increasing altitude (or decreasing pressure).

Equation P1/T1 = P2/T2 Key Initial Pressure: Pi Initial Temperature: Ti Final Pressure: Pf Final Temperature: Tf

Graph The pressure and temperature are rising at a steady rate here

Demo Drop a small amount of lit paper in the bottle and cap it with the egg. After several seconds, the flame in the bottle will go out and the egg will be pushed down into the bottle with a pop. https://www.youtube.com/watch?v=l82lbGbLjyI

Real Life Examples Heating of a tire The amount of pressure in a tire already is very high. Being exposed to different temperatures during say winter of summer can change the amount of pressure in the tire. Opening of an oven When a person opens up an oven it causes a release of pressure along with a release of heat changing the properties of both.

How to Solve Convert the temperature to Kelvin. Kelvin is the Standard International (SI) unit of thermodynamic temperature. Add 273 to your temperature. (K = °C + 273.15) Input numbers into formula. Multiply T2 by P1 and divide by T1 Don't forget sig figs!

Together Question: The pressure in a sealed can of gas is 235 KpA when it sits at room temperature (20c). If the can is warmed to 48c what will the new pressure inside the can be? Equation: P1/T1 = P2/T2

Your Turn! Equation: P1/T1 = P2/T2 A car has a pressure of 238 atm at 25.3 Deg Cel. If the pressure inside reaches at 4.08 atm, the tire will explode. How hot would the tire have to get for this to happen?

Did you get it right? The answer is 5.11 K

Works Cited "Charles and Gay-Lussac's Law." Charles and Gay-Lussac's Law. N.p., n.d. Web. 10 Mar. 2016. "ChemTeam: Gas Law - Gay-Lussac's Law." ChemTeam: Gas Law - Gay-Lussac's Law. N.p., n.d. Web. 10 Mar. 2016. "Chemistry: Gay-Lussac's Law (Gas Laws) with 2 Examples." YouTube. YouTube, n.d. Web. 13 Mar. 2016. "Gay-Lussac's Law Tutorial." Learn Gay-Lussac's Law Tutorial, Example, Formula. N.p., n.d. Web. 11 Mar. 2016. Goates, Wayne. "Egg in the Bottle Demonstration." NSTA News. 01 May 2003. Web. 11 Mar. 2016. "How to Convert Celsius to Kelvin." About.com Education. N.p., n.d. Web. 11 Mar. 2016. "What Is Kelvin (K)? - Definition from WhatIs.com." WhatIs.com. N.p., n.d. Web. 11 Mar. 2016.