# chapter 5 - Chapter 5: Gases Properties of Gases Gas Laws...

This preview shows pages 1–14. Sign up to view the full content.

Chapter 5: Gases • Properties of Gases • Gas Laws (pressure, volume, temperature, moles) • Gases in Chemical Reactions • The Kinetic Model of Gases

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

View Full Document
Atmospheric Composition • Atmosphere is a Mixture of Gases – Permanent Gases • Nitrogen • Oxygen • Argon
Splitting of Water O2 H2 + -

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

View Full Document
Avogadro ʼ s Law • Gay-Lussac 1808 –Small volumes of gases react in the ratio of small whole numbers. • Avogadro 1811 –Equal volumes of gases have equal numbers of molecules and –Gas molecules may break up when they react.
Formation and Splitting of Water

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

View Full Document
Effects of Pressure • A small amount of H 2 O (l) is heated in the can. It can expand to 1200 times its original volume when heated to the gas phase at 25 o C and 1 atm.
Effects of Pressure • When the can is sealed and cooled the water molecules slow down, condense to liquid, and exert less pressure. The pressure of the atmosphere pushes in on the can.

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

View Full Document
Pressure = Force/Area
Standard Atmospheric Pressure 1.00 atm 760 mm Hg, 760 torr 101.325 kPa 1.01325 bar 1013.25 mbar A barometer a pressure measurement device

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

View Full Document
Pressure • One physical property of a gas is that it exerts pressure on it ʼ s surroundings. • Pressure = Force (N) 1Pa = 1N area (m 2 ) m 2 • Atmospheric pressure is the pressure exerted by the earth ʼ s atmosphere or the column of air above an object.
SI base units Base quantity Name Symbol length meter m mass kilogram kg time second s electric current ampere A temperature kelvin K amount of substance mole mol luminous intensity candela cd

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

View Full Document
• Where is the atmospheric pressure greater; on top of Mt. Everest or in Death Valley?
• At higher altitudes, atmospheric pressures are lower and the boiling point of water is less than 100 °C (E.g. Denver, CO: 630mm Hg, 95

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.

## chapter 5 - Chapter 5: Gases Properties of Gases Gas Laws...

This preview shows document pages 1 - 14. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online