Virtual Museum of Art | Virtual Museum of History | Virtual Public Library | Virtual Science Center | Virtual Museum of Natural History | Virtual War Museum
   You are in: Virtual Museum of Science >> Hall of Chemistry >> Dalton's Law Of Partial Pressures





American’s Four United Republics: Discovery-Based Curriculum

For More Information go to America's Four United Republics Curriculum


 


Dalton's Law Of Partial Pressures

Ptotal = Pa + Pb + Pc

vogadro's law (sometimes referred to as Avogadro's hypothesis or Avogadro's principle) is a gas law named after Amedeo Avogadro who, in 1811,  hypothesized that two given samples of an ideal gas, at the same temperature, pressure and volume, contain the same number of molecules.


 

The pressure of a mixture of gases is equal to the sum of the pressures of all of the constituent gases alone.

Mathematically, this can be represented as:
 

PressureTotal = Pressure1 + Pressure2 ... Pressuren

 

Dalton's Law explains that the total pressure is equal to the sum of all of the pressures of the parts. This only is absolutely true for ideal gases, but the error is small for real gases. 

 

 

Wikipedia - In chemistry and physics, Dalton's law (also called Dalton's law of partial pressures) states that the total pressure exerted by a gaseous mixture is equal to the sum of the partial pressures of each individual component in a gas mixture. This empirical law was observed by John Dalton in 1801 and is related to the ideal gas laws.

Mathematically, the pressure of a mixture of gases can be defined as the summation

P_{total} = \sum_{i=1} ^ n {p_i}       or      P_{total} = p_1 +p_2 + \cdots + p_n

where p_{1},\ p_{2},\dots,\ p_{n} represent the partial pressure of each component.

It is assumed that the gases do not react with each other.

\ p_{i} =P_{total}y_i

where y_i\ =  the mole fraction of the i-th component in the total mixture of n components .

The relationship below provides a way to determine the volume based concentration of any individual gaseous component.

P_i =\frac{P_{total}C_i}{1,000,000}

where: C_i\ =  is the concentration of the ith component expressed in ppm.

Dalton's law is not exactly followed by real gases. Those deviations are considerably large at high pressures. In such conditions, the volume occupied by the molecules can become significant compared to the free space between them. Moreover, the short average distances between molecules raises the intensity of intermolecular forces between gas molecules enough to substantially change the pressure exerted by them. Neither of those effects are considered by the ideal gas model.


Start your search on Dalton's Law Of Partial Pressures.


America's Four United Republics Exhibit - Click Here


Unauthorized Site: This site and its contents are not affiliated, connected, associated with or authorized by the individual, family, friends, or trademarked entities utilizing any part or the subject's entire name. Any official or affiliated sites that are related to this subject will be hyper linked below upon submission and Evisum, Inc. review.

Copyright© 2000 by Evisum Inc.TM. All rights reserved.
Evisum Inc.TM Privacy Policy

Search:

About Us

 

 

Image Use

Please join us in our mission to incorporate America's Four United Republics discovery-based curriculum into the classroom of every primary and secondary school in the United States of America by July 2, 2026, the nation’s 250th birthday. , the United States of America: We The People Click Here

 

Childhood & Family

Click Here

 

Historic Documents

Articles of Association

Articles of Confederation 1775

Articles of Confederation

Article the First

Coin Act

Declaration of Independence

Declaration of Independence

Emancipation Proclamation

Gettysburg Address

Monroe Doctrine

Northwest Ordinance

No Taxation Without Representation

Thanksgiving Proclamations

Mayflower Compact

Treaty of Paris 1763

Treaty of Paris 1783

Treaty of Versailles

United Nations Charter

United States In Congress Assembled

US Bill of Rights

United States Constitution

US Continental Congress

US Constitution of 1777

US Constitution of 1787

Virginia Declaration of Rights

 

Historic Events

Battle of New Orleans

Battle of Yorktown

Cabinet Room

Civil Rights Movement

Federalist Papers

Fort Duquesne

Fort Necessity

Fort Pitt

French and Indian War

Jumonville Glen

Manhattan Project

Stamp Act Congress

Underground Railroad

US Hospitality

US Presidency

Vietnam War

War of 1812

West Virginia Statehood

Woman Suffrage

World War I

World War II

 

Is it Real?



Declaration of
Independence

Digital Authentication
Click Here

 

America’s Four Republics
The More or Less United States

 
Continental Congress
U.C. Presidents

Peyton Randolph

Henry Middleton

Peyton Randolph

John Hancock

  

Continental Congress
U.S. Presidents

John Hancock

Henry Laurens

John Jay

Samuel Huntington

  

Constitution of 1777
U.S. Presidents

Samuel Huntington

Samuel Johnston
Elected but declined the office

Thomas McKean

John Hanson

Elias Boudinot

Thomas Mifflin

Richard Henry Lee

John Hancock
[
Chairman David Ramsay]

Nathaniel Gorham

Arthur St. Clair

Cyrus Griffin

  

Constitution of 1787
U.S. Presidents

George Washington 

John Adams
Federalist Party


Thomas Jefferson
Republican* Party

James Madison 
Republican* Party

James Monroe
Republican* Party

John Quincy Adams
Republican* Party
Whig Party

Andrew Jackson
Republican* Party
Democratic Party


Martin Van Buren
Democratic Party

William H. Harrison
Whig Party

John Tyler
Whig Party

James K. Polk
Democratic Party

David Atchison**
Democratic Party

Zachary Taylor
Whig Party

Millard Fillmore
Whig Party

Franklin Pierce
Democratic Party

James Buchanan
Democratic Party


Abraham Lincoln 
Republican Party

Jefferson Davis***
Democratic Party

Andrew Johnson
Republican Party

Ulysses S. Grant 
Republican Party

Rutherford B. Hayes
Republican Party

James A. Garfield
Republican Party

Chester Arthur 
Republican Party

Grover Cleveland
Democratic Party

Benjamin Harrison
Republican Party

Grover Cleveland 
Democratic Party

William McKinley
Republican Party

Theodore Roosevelt
Republican Party

William H. Taft 
Republican Party

Woodrow Wilson
Democratic Party

Warren G. Harding 
Republican Party

Calvin Coolidge
Republican Party

Herbert C. Hoover
Republican Party

Franklin D. Roosevelt
Democratic Party

Harry S. Truman
Democratic Party

Dwight D. Eisenhower
Republican Party

John F. Kennedy
Democratic Party

Lyndon B. Johnson 
Democratic Party 

Richard M. Nixon 
Republican Party

Gerald R. Ford 
Republican Party

James Earl Carter, Jr. 
Democratic Party

Ronald Wilson Reagan 
Republican Party

George H. W. Bush
Republican Party 

William Jefferson Clinton
Democratic Party

George W. Bush 
Republican Party

Barack H. Obama
Democratic Party

Please Visit

Forgotten Founders
Norwich, CT

Annapolis Continental
Congress Society


U.S. Presidency
& Hospitality

© Stan Klos

 

 

 

 


Virtual Museum of Art | Virtual Museum of History | Virtual Public Library | Virtual Science Center | Virtual Museum of Natural History | Virtual War Museum