'1 atm' diaporamas de présentation

Friday 4/27. An Introduction to Gases. Chapter 13. Kinetic Molecular Theory. Postulate #1 Gases consist of tiny particles (atoms or molecules) Postulate #2

CHE101 Gases Instructor: HbR. Elements that exist as gases at 25 0 C and 1 atmosphere. Physical Characteristics of Gases. Gases assume the volume and shape of their containers. Gases are the most compressible state of matter.

Matter and Energy. Chapter 12.4 Chapter 15.1 - 15.3. Chapter Objectives. Identify observable characteristics of a chemical reaction Define Energy Show how energy applies to chemical reactions and physical processes Interpret phase diagrams Interpret heating (cooling) curves.

Gases. 5/75 Questions in multiple choice Almost every year in free response section. 5.1 Gas Pressure . Gases exert pressure on any surface they come in contact with.

Bellwork Monday, January 6 th. List three differences in the particles that make up the substances below. CHEMISTRY Unit 5.1 THE STATES OF MATTER and gas laws. Kinetic theory of gases - valid only at extremely low density.

Gas Laws and Nature of Gases. Chapter 13 & 14. Gas Demos. Soda Cans Volume and temperature What happened to the volume when the temperature decreased. Cartesian Diver Pressure and volume What happened to the volume when you applied pressure. Gas Basics.

Chapter 5. Gases. Properties of a gas. 5.1 Pressure. Uniformly fills any container. Mixes completely with any other gas Exerts pressure on its surroundings. Compressible Gas pressure varies with altitudes and storms. Force (N). P (Pa) =. Area (m 2 ).

BEHAVIOR OF GASES Chapter 14. Importance of Gases. Airbags fill with N 2 gas in an accident. Gas is generated by the decomposition of sodium azide, NaN 3 . 2 NaN 3(s) ---> 2 Na (s) + 3 N 2(g). THREE STATES OF MATTER. Click picture above to view movie on states of matter

Intermolecular Forces and Liquids and Solids. Chapter 11. Fig 11.19 Heating curve for water Indicates changes when 1.00 mol H 2 O is heated from 25°C to 125°C at constant P. Sample Exercise 11.4 Calculating Δ H for Temperature and Phase Changes.

Density of air (outside) = 1.2 mg/mL. Density of air (inside) = 0.88 mg/mL. Properties of Gases. Pressure: the pressure of a gas is caused by the gas particles colliding with the walls of the container. Pressure is always a force exerted over an area. (P = F/A)

Zumdahl’s Chapter 5. Gases. Importance of Gases Gas Pressure Kinetic Theory of Gases Gas Laws Boyle: PV constant Charles: V / T constant Avogadro: V / n constant Ideal Gas Law: PV = n R T. Gas Stoichiometry Partial Pressures and Mole Fractions, X i Effusion Diffusion

Gas laws. SCH3U, Strand f: Gases and atmospheric chemistry. By Farah Farah and Vanessa Poehlmann. Minds On! The Mysterious Shrinking Balloon. Investigation done in pairs. Inflate a balloon and tie off the end tightly. Use a string to measure its circumference.

What is the difference between the molecules in a cup of water and the molecules in a cube of ice?. A the molecules in water have less kinetic energy. The molecules in the cube of ice are less free to move. The molecules in the cube of ice are moving faster.

Synthesis. AgNO 3 , ATP, NaBH 4. (rt, 1 atm). Concentrate with ultracentrifuge at 45K and/or ppt using i-PrOH. Ag:ATP:BH 4 - controls size 1:0.1:16  large NPs (5 - 10 nm) 1:5:16  small NPs (1.8 - 2.5 nm) (bright yellow). 1:0.1:16  5 - 10 nm.

Reactions that cause change of oxidation numbers are called redox reactions. Element loses electrons → its oxidation number increases → element is oxidized → oxidation reaction. Substance that contains the oxidized element is call the reducing agent.

Gases Chapter 9. What parameters do we use to describe gases? pressure: force/unit area 1 atm = 101 kPa; volume: liters (L) Temperature: K.

The Gaseous State of Matter. Preparation for College Chemistry Columbia University Department of Chemistry. Chapter Outline. KMT. Gas Laws. Ideal Gas Equation. Gas Stoichiometry. Air Pollution. Preliminary Observations. Molar mass of water: 18g /mole. 6.02x10 23 molecules weigh 18g.

Dr. C. Weldon Mathews Chem 122 Office: 0042 Evans Lab Telephone: 292-1574 email: mathews.6@osu.edu course web site: http://www.chemistry.ohio-state.edu/~mathews/chem122wi07/ Office hours: TR 12:30 - 2:00 pm TR 4:00 - 5:00 pm

Gases. Chapter 12. Gases. Properties: Gases are fluids because their molecules/atoms can flow Gases have low density Highly compressible – their volume can be reduced Gases will completely fill their container. Gases. Gas Pressure

Microplasmas: Physics and Applications. Presented at the MIT Plasma Science and Fusion Center February 18, 2005 Jeff Hopwood, Northeastern University. Outline. Motivation: Applications Plasma Display Panels Micro Propulsion Micro Chemical Analysis Systems “lab-on-a-chip” others