Download presentation

Presentation is loading. Please wait.

Published byKylie Fitzpatrick Modified over 3 years ago

1
Daltons Law P total = P 1 + P 2 + P 3 +...

2
Daltons Law The pressure of each component is called the partial pressure of that component.

3
Daltons Law For example: If we have a flask containing nitrogen gas, whose partial pressure is.78 atm and oxygen gas, whose partial pressure is.20 atm, the total pressure in the flask is P total = P N2 + P O2 P total =.78 +.20 =.98 atm

4
Daltons Law Another way to think about this is through the use of the mole fraction. The mole fraction is rather like calculating the percent of each component.

5
Daltons Law The mole fraction is written as follows a N2 = moles N 2 total moles total moles This is basically the percent (by number) of some element.

6
Daltons Law We can rearrange Daltons Law to use the mole fraction as follows: P x = a x (P total ) Or specifically: P N2 = a N2 (P total )

7
Daltons Law For example: ordinary air contains 78.084% nitrogen. We might be interested in knowing what the partial pressure of nitrogen is in the atmosphere.

8
Daltons Law The mole fraction of N 2 must be.78084, so P N2 =.78084(P total ) If the atmospheric pressure is 640 torr, P N2 =.78084(640) = 500 torr

9
Composition of Air 78.084%Nitrogen 20.948%Oxygen.934%Argon.0315%Carbon dioxide.001818%Neon.000524%Helium.000114%Krypton.0000087%Xenon

Similar presentations

OK

Nitrogen 78% Oxygen 21% Gases in Dry Air Trace Gases 1% Trace Gases Percentage by Volume Argon Carbon dioxide Neon Helium Methane Krypton Hydrogen 0.93.

Nitrogen 78% Oxygen 21% Gases in Dry Air Trace Gases 1% Trace Gases Percentage by Volume Argon Carbon dioxide Neon Helium Methane Krypton Hydrogen 0.93.

© 2018 SlidePlayer.com Inc.

All rights reserved.

Ads by Google

Ppt on network security attacks Share ppt online Ppt on total parenteral nutrition guidelines Ppt on cartesian product multiplication Ppt on culture and science in the ancient period of philosophy Ppt on creativity and innovation management journal Ppt on extinct animals of india Ppt on ram and rom explained Ppt on morbid obesity and anaesthesia Ppt on 555 timer ic