### Present Remotely

Send the link below via email or IM

• Invited audience members will follow you as you navigate and present
• People invited to a presentation do not need a Prezi account
• This link expires 10 minutes after you close the presentation

Do you really want to delete this prezi?

Neither you, nor the coeditors you shared it with will be able to recover it again.

# Gay-Lussac's Gas Law

Chemistry Project
by

## Zoe' Hunter

on 20 May 2014

Report abuse

#### Transcript of Gay-Lussac's Gas Law

Soda Can Experiment

Joseph Louis Gay-Lussac (1778–1850)
A French chemist and physicist,
Known for his studies on the physical
properties of gases.
A balloon enthusiast as well, in 1804 he
made a hot-air balloon ascent to a height of 20,000 feet in
an early investigation of the Earth's atmosphere
In 1805, discovered that the basic composition of the
atmosphere does not change with decreasing pressure
(increasing altitude).

Definition of Gay-Lussac's Law
Explanation of Real World Applications

1. Soda: If a can of pop becomes heated, the can will explode.
Guy-Lussac’s law explains this, because as the temperature rises, the pressure inside the can increases at the same rate. As the pressure inside pushes outwards on the can, it will eventually explode.

2. Firing a gun:
A gun is fired when gun powder is heated. As the temperature rises, the pressure builds up and expands behind the bullet, until it is fired.

Law Continued...
Gay-Lussac's law is represented by a mathematical relationship.
Sample Problem
A 20 L cylinder contains 6 atm of gas at 27°C. What would the pressure of the gas be if the gas was heated to 77 °C?
Gay-Lussac's Law

-Gay Lussac’s law states that:
The pressure of an ideal gas is directly proportional to its absolute temperature.

-Temperature goes up, pressure goes up. Temperature goes down, pressure goes down.
-Only applies to ideal
gases with a constant volume.

"P" stands for pressure and "T" stands for temperature

P1 = initial pressure
T1 = initial absolute temperature
P2 = final pressure
T2 = final absolute temperature

Temperature is measured in
Kelvins (K)! NOT °C or °F
. Pressure is measured in
pascals (Pa),
defined as a force of one newton per square meter
Or it can be measured in atmospheres (atm) Atmosphere originally was a unit related to the air pressure at sea level.

Since the cylinder's volume remains unchanged while the gas is heated Gay-Lussac's gas law applies!
Variables:
P1 = 6 atm
T1 = 27°C
P2 = ? atm
T2 = 77°C
Step 1: Convert from Celsius to Kelvin (K)
27°C + 273 = 300 K
77°C + 273 = 350 K
Step 2: Insert variables into equation and solve for Pf
7 atm
*Demonstration*
Demonstration(s)
Works Cited
"Charles and Gay-Lussac's Law." Charles and Gay-Lussac's Law. NASA, 7 Mar. 2011. Web. 15 May 2014.
Helmenstine, Todd. "What Is The Formula For Gay-Lussac’s Law?"About.com Chemistry. N.p., n.d. Web. 16 May 2014.
Helmenstine, Todd. "Review Gay-Lussac's Gas Law with This Sample Chemistry Problem." About.com Chemistry. About.com. Web. 17 May 2014.
Helmenstine, Anne M. "How to Convert Celsius to Kelvin." About.com Chemistry. About.com. Web. 17 May 2014.
"Gases." Gases. NJIT. Web. 20 May 2014. <http://njcmr.njit.edu/distils/lab/chemistry/Gases/gas.html>.