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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?. Charles’ Law. Jacques Charles. 1746-1823 French chemist

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Warm-Up

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  1. 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?

  2. Charles’ Law

  3. Jacques Charles • 1746-1823 • French chemist • Discovered the relationship between volume and temperature while experimenting with hot air balloons.

  4. 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.

  5. V1 = V2T1 T2 • V1= initial volume • T1= initial temperature* • V2= final volume • T2= final temperature* *temperature must be in Kelvin scale! K= °C+273

  6. 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

  7. 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

  8. 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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