Solving Gas Law Problems: Partial Pressure & Relative Diffusion Rates

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SUMMARY

The discussion focuses on solving gas law problems, specifically calculating partial pressures and relative diffusion rates. For the first problem, participants emphasize converting weights to moles to determine individual gas pressures, noting that partial pressures are proportional to molar fractions. The second problem involves using Graham's Law to find the molecular weight of an unknown gas when given the diffusion rate of methane (molecular weight = 16) and a relative diffusion rate of 1.89.

PREREQUISITES
  • Understanding of gas laws, specifically Dalton's Law of Partial Pressures
  • Knowledge of Graham's Law of Effusion
  • Ability to convert weights to moles using molar mass
  • Familiarity with molecular weight calculations
NEXT STEPS
  • Study Dalton's Law of Partial Pressures for calculating individual gas pressures
  • Learn Graham's Law of Effusion to understand diffusion rates between gases
  • Practice converting weights to moles with various gas samples
  • Explore molecular weight determination techniques for different gases
USEFUL FOR

Students studying chemistry, particularly those focusing on gas laws, as well as educators looking for effective methods to teach these concepts.

maximade
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heres a partial pressure one:
1. A mixture of gases containing equal weights of carbon dioxide, CO, and ammonia exerts an overall pressure of 450 torr. What pressure is exerted by each gas individually?

my last question is:
2. The relative rate of diffusion between two gases is 1.89. If the lighter gas is methane (mw=16), what is the molecular weight of the other gases?

for the first one, I could probably guess and check to get my answer, but i wouldn't understand it overall. For the second one, my teacher didn't even go over rates and that stuff. Mind explaining to me how to get the answer? thank you.
 
Physics news on Phys.org
1. Convert weights to moles. Partiall pressures are proportional to molar fractions.

2. Graham's law

Please note, that you should use homework template, when asking homework questions.
 

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