Chapter 5

# Chapter 5 - Gases Gases Chapter 5 1 • Macroscopic...

This preview shows pages 1–27. Sign up to view the full content.

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

View Full Document

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

View Full Document

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

View Full Document

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

View Full Document

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

View Full Document

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

View Full Document

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

View Full Document

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

View Full Document

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

View Full Document

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

View Full Document

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

View Full Document

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

View Full Document

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.

Unformatted text preview: Gases Gases Chapter 5: 1 • Macroscopic properties are due to structures of its constituent molecules and the interactions between them http://www.media.pearson.com.au/schools/cw/au_sch_whalley_sf1_1/int/matter.html 2 • Macroscopic behavior of a fixed mass of gas ( moles of gas= n n ) is completely characterized by 3 properties 3 properties V, P and T V, P and T • V V = liter = liter • P P = atm = atm or pascal or pascal • T T = Kelvin = Kelvin 3 5.1 Pressure Pressure: force per unit area SI unit of pressure: Pascal (pa) 1 Pa = 1 N/m 2 1 N = 1 kg · m/s 2 4 5.1 Pressure Barometer : the device to measure atmospheric pressure. 1 atm = 760 mm of Hg =760 torr = 101,325 Pa = 101.325 kPa = 14.69 psi 5 5.1 Pressure manometer : the device to measure pressure of a gas in a container. 6 Gases Obey Obey Laws !!!! • Scientific laws that describe the relationships between 4 important physical properties of Gases: • T, P, V & amount (moles) 5.2 The gas law of Boyle, Charles and Avogadro 7 Boyle’s Law • Pressure-volume relationship PV= k • P ∝ 1/V • Inverse relationship 8 Boyle’s Law Illustrated At Constant Temp. 9 Boyle’s Law Data 10 PV = k 11 12 13 Mechanics of Breathing PV = k 14 SCUBA Diving • S elf C ontained U nderwater B reathing A pparatus • Rapid rise causes “the bends” – Nitrogen bubbles out of blood rapidly from pressure decrease Must rise slowly to the surface to avoid the “bends”. 15 • Bicycle pump is an example of Boyle’s law • As the volume of the air trapped in the pump is reduced, its pressure goes up, and air is forced into the tire. 16 Charles’s Law • T and V relationship • V ∝ T or V/T = b • In gas law calculations Kelvin temperature must be used. 17 • Balloon filled with helium gas placed in the cold will shrink and when placed back in warmer temperatures expands • A football inflated inside and then taken outdoors on a winter day shrinks slightly 18 19 20 Gay Lussac’s Law • P α kelvin T 21 Avogadro’s Law • Equal volumes of gases at the same T and P contain equal numbers of gas particles • V α n • V=kn 22 http://cwx.prenhall.com/bookbind/pubbooks/ hillchem3/chapter5/medialib/0507.html http://cwx.prenhall.com/bookbind/pubbooks/hillch 23 Boyle’s Law V= k/P Charle’s law V= b.T Avogadro’s Law V=a.n equation constant T, n P, n T,P V = k.b.a .nT = V = nRT/P = PV = nRT P 5.3 The Ideal Gas Law 24 Ideal Gas law • PV= nRT • R= 0.08206 liters · atm/ (Kelvin ·mol) = 8.314 meter 3 ·Pa/ (Kelvin·mol) = 8.314 J/ (Kelvin · mol) 25 IDEAL GAS LAW IDEAL GAS LAW PV = nRT P = pressure in atm....
View Full Document

{[ snackBarMessage ]}

### Page1 / 62

Chapter 5 - Gases Gases Chapter 5 1 • Macroscopic...

This preview shows document pages 1 - 27. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online