Pressure - therefore an average speed) the individual...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Pressure The pressure of a gas is causes by collisions of the molecules with the walls of the container. The magnitude of the pressure is related to how hard and how often the molecules strike the wall The "hardness" of the impact of the molecules with the wall will be related to the velocity of the molecules times the mass of the molecules Absolute Temperature The absolute temperature is a measure of the average kinetic energy of its molecules If two different gases are at the same temperature, their molecules have the same average kinetic energy If the temperature of a gas is doubled , the average kinetic energy of its molecules is doubled Molecular Speed
Background image of page 1

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

View Full DocumentRight Arrow Icon
Although the molecules in a sample of gas have an average kinetic energy (and
Background image of page 2
Background image of page 3
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: therefore an average speed) the individual molecules move at various speeds • Some are moving fast, others relatively slowly • At higher temperatures at greater fraction of the molecules are moving at higher speeds What is the speed (velocity) of a molecule possessing average kinetic energy? • The average kinetic energy, ε , is related to the root mean square (rms) speed u Example: Suppose we have four molecules in our gas sample. Their speeds are 3.0, 4.5, 5.2 and 8.3 m/s. • The average speed is: • The root mean square speed is: • Because the mass of the molecules does not increase, the rms speed of the molecules must increase with increasing temperature...
View Full Document

This note was uploaded on 11/22/2011 for the course CHEMISTRY CHM1025 taught by Professor Laurachoudry during the Fall '10 term at Broward College.

Page1 / 3

Pressure - therefore an average speed) the individual...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online