Lecture24

# Lecture24 - Chapter 19 The Kinetic Theory of Gases PHYS 2101 P.M.Shikhaliev LSU Fall 2010 1 19.2 Avogadros Number Avogadros Law All gases having

This preview shows pages 1–4. Sign up to view the full content.

Chapter 19 The Kinetic Theory of Gases 1 PHYS 2101, P.M.Shikhaliev LSU, Fall 2010

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
19.2. Avogadro’s Number Avogadro’s number and “mole” quantity: Let us we have two gas samples: 1 st - N molecules of H 2 , and 2 nd - N molecules of O 2 The mass of the H 2 sample is M H = (N)x(2amu) = (N)x(2)x(1.66 x10 -24 g) The mass of the O 2 sample is N O = (N)x(32amu) = (N)x(32)x(1.66 x10 -24 g) If we select N = 6.02 x 10 23 , then (N)x(1.66 x10 -24 g) = 1 g, and M H = 2 g, and M O = 32 g The number N A = N = 6.02 x 10 23 is called Avogadro’s number By convention, Avogadro’s number is defined as number of atoms in 12 g Carbon. The amount of matter including N A atoms is called 1 mole of this matter All gases including N A atoms or molecules have same volume of V A = 22.4 L Molar mass M = N A x m , where m is the mass of the atom or molecule 2 PHYS 2101, P.M.Shikhaliev LSU, Fall 2010 Avogadro’s Law: All gases having same volume, same pressure, and same temperature contain same numbers of molecules.
19.3. Ideal Gases Here p is the absolute pressure, n is the number of moles of gas present, and T is its temperature in Kelvin's. R is the gas constant that has the same value for all gases. 3

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

## This note was uploaded on 01/26/2011 for the course PHYS 2101 taught by Professor Grouptest during the Spring '07 term at LSU.

### Page1 / 14

Lecture24 - Chapter 19 The Kinetic Theory of Gases PHYS 2101 P.M.Shikhaliev LSU Fall 2010 1 19.2 Avogadros Number Avogadros Law All gases having

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online