DO NOW (Back of Notes): Update your Table of Contents! 1) The temperature inside my refrigerator is about 40 Celsius. If I place a balloon in my fridge that initially has a temperature of 220 C and a volume of 0.5 liters, what will be the volume of the balloon when it is fully cooled by my refrigerator?   2) A man heats a balloon in the oven. If the balloon initially has a volume of 0.4 liters and a temperature of 20 0C, what will the volume of the balloon be after he heats it to a temperature of 250 0C?

After today you will be able to… Explain the effect on gas properties using Gay-Lussac’s Law and the Combined Gas Law Calculate an unknown pressure, temperature, or volume by solving algebraically

Gay-Lussac’s Law: Pressure and Temperature Joseph Gay-Lussac discovered the relationship between temperature and pressure. His name is on the gas law that describes this relationship.

“For a given volume of a gas, as the temperature of an enclosed gas increases, the pressure of a gas is directly proportional.”

Gay-Lussac’s Law: Pressure and Temperature We can simplify this relationship by the formula: Where, P1, P2 = pressure in any unit (atm, kPa, or mmHg), BUT they must match! T1, T2 = temperature is always in Kelvin! (Recall, just add 273 + °C) P1 P2 T1 T2 =

Happy Birthday Egg!!

Gay-Lussac’s Law: Example A gas has a pressure of 103kPa at 25°C. What will the pressure be when the temperature reaches 928°C? P1= T1= P2= T2= 103kPa P1 P2 T1 T2 = 25°C +273= 298K ? 928°C+273= 1201K (103kPa) (P2) = (298K) (1201K) P2 = 420kPa

Gay-Lussac’s Law: Number 1 Aerosol can carry warnings on their labels that say not to incinerate (burn) them or store the cans above a certain temperature. The gas in a used aerosol can is at a pressure of 103 kPA at 25°C. If the can is thrown into a fire, what will the pressure be when the temperature reaches 928°C? P1= T1= P2= T2=

Questions? Practice Time!

Questions? Complete WS 2