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Warm-Up. A gas is pumped into a container with a volume of 2.8L at 5.63atm. If the pressure is increased to 25.3atm, what will the new volume be?. Charles’ Law. Jacques Charles. 1746-1823 French chemist

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warm up
Warm-Up

A gas is pumped into a container with a volume of 2.8L at 5.63atm. If the pressure is increased to 25.3atm, what will the new volume be?

jacques charles
Jacques Charles
  • 1746-1823
  • French chemist
  • Discovered the relationship between volume and temperature while experimenting with hot air balloons.
charles law1
Charles’ Law
  • At constant pressure, temperature and volume have a direct relationship.
    • As one goes up the other goes up, too.
  • Can be explained through kinetic molecular theory.
    • Increasing temperature increases average kinetic energy. This causes the molecules to move faster and collide the container with more force. To counter this force, the volume will increase.
v 1 v 2 t 1 t 2
V1 = V2T1 T2
  • V1= initial volume
  • T1= initial temperature*
  • V2= final volume
  • T2= final temperature*

*temperature must be in Kelvin scale!

K= °C+273

slide6
A gas has a volume of 2.5 L at 35.°C. What would the new volume be if the temperature was raised to 100.°C?

V1 = V2T1 T2

2.5 = V2308 373

932.5 = 308V2

308

3.0L= V2

slide7
A sample of neon gas occupies a volume of 752 mL at 25°C. What volume will the gas occupy at 50°C if the pressure remains constant?

V1 = V2T1 T2

752 = V2298 323

242896 = 298V2

298 298

815mL= V2

slide8
A gas at 65°C occupies 4.22 L. At what temperature will the volume be 3.87 L, assuming the same pressure?

V1 = V2T1 T2

4.22 = 3.87

338 T2

1308.06 = 4.22T2

4.22 4.22

310K= T2

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