Week 2 Lectures - Chem 139

Week 2 Lectures - Chem 139 - Fundamental Units SI System...

Info iconThis preview shows pages 1–10. Sign up to view the full content.

View Full Document Right Arrow Icon
Fundamental Units SI System Examples: Mass (weight): Length: Temperature: Time: Pressure: Other measurement units are derived from the base units; accordingly, they are called Derived Units Examples: Density, Speed, Concentration Kilogram (kg) Meter (m) Kelvin (K) Second (s) Pascal (Pa)
Background image of page 1

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

View Full DocumentRight Arrow Icon
Mass vs. Weight Weight = mass x acceleration due to gravity Mass ≠ Weight!
Background image of page 2
Length leads to Volume Fundamental Unit of Length = 1 meter Defined as distance traveled by light in 1 / 299,792,468 second 1 / 100 of a meter is a centimeter (cm) A cube of water that is 1 cm on a side has a volume of 1 cm 3 This volume of water is one milliliter (ml) 1 ml = 1 cm 3 (remember this!) It has a mass of 1 gram at 4C thus, 1 ml (of water ) weighs 1 gram at 4C. 1000 ml = 1 liter; how much does this weigh? 1 liter = 1 dm 3 (handy to know) 1 cubic meter has 1000 liters …. How much does this weigh?
Background image of page 3

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

View Full DocumentRight Arrow Icon
4 Temperature http://climate.uvic.ca/climate-lab/front_page_pics/temperature.html http://www.sensorprod.com/dynamic/temperature_mapping.php
Background image of page 4
8 Fig. 3-8, p. 77 Note that the “size” of a degree is different in the Fahrenheit and Celsius scales. F = 9/5*C + 32 The Celsius and Kelvin scales have the same degree size. K = C + 273 http://www.sizes.com/units/tempera ture_Fahrenheit.htm
Background image of page 5

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

View Full DocumentRight Arrow Icon
Temperature Conversions 1. Convert 38 F to Celsius. 2. Convert 295 K to Celsius. 3. Convert 58 F to Kelvin.
Background image of page 6
Chemical Kinetic Energy Petrucci, Fig. 7.9 How do molecules move around? Translation: motion through space Rotation : motion about the center of mass Vibration: motion directed through chemical bonds
Background image of page 7

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

View Full DocumentRight Arrow Icon
Kinetic Molecular Theory Temperature = movement of particles Hot objects have (fast/slow) _______moving particles Cold objects have (fast/slow) _______moving particles Increasing the speed of particles (increases/decreases) __________ temperature Only temperature without particle movement is ___________________________ How do particles in a solid move vs. in a liquid or gas?
Background image of page 8
Faster water molecules Slower water molecules Lukewarm water (50 o C) Faster, slower?
Background image of page 9

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

View Full DocumentRight Arrow Icon
Image of page 10
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 03/13/2010 for the course ENG 101 taught by Professor Wyman during the Spring '09 term at Seattle Central Community College.

Page1 / 34

Week 2 Lectures - Chem 139 - Fundamental Units SI System...

This preview shows document pages 1 - 10. Sign up to view the full document.

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