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Week 1 Notes

by: beckdaysha
GPA 3.0

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About this Document

This covers some of the material that will be on the first exam. These notes introduce density, specific gravity, and an introduction to heat.
Elementary Chemistry 1
Keith Anliker
Class Notes
Chemistry, Chemistry 101, C 101, Density, Specific Gravity, heat
25 ?




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This 2 page Class Notes was uploaded by beckdaysha on Sunday January 10, 2016. The Class Notes belongs to CHEM-C 101 at Indiana University Purdue University - Indianapolis taught by Keith Anliker in Winter 2016. Since its upload, it has received 63 views. For similar materials see Elementary Chemistry 1 in Chemistry at Indiana University Purdue University - Indianapolis.


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Date Created: 01/10/16
C101 Elementary Chemistry IUPUI Week 1 (1/13) Density 1) Definition: Amount of mass packed into volume a) Density = mass/volume 2) Density of water is 1.0 g/mL a) 1g of water = 1 mL b) 1 mL of water weighs 1g 3) Density of Hg (mercury) is 13.6 g/mL a) 1 gal of Hg is like lifting 14 gallons of milk Typical Density Problems: 1) Given 3 variables (D, m, V) a) Given 2, solve for 1 b) Units are IMPORTANT c) Can use density equation OR conversion 2) Example Problem #1 a) Density = 13.6 g/mL 13.6g Volume = 5.50 mL mL × 5.50mL = Mass =? 3) Example Problem #2 a) Density = 0.912 g/mL 1mL Volume =? 75.4g× 0.912g=82.7mL Mass = 75.4 g How does the density of ice compare to liquid water?  Density of ice is less than the density of liquid water a) Because it floats b) Ex: Soda can exploding in freezer c) Water is different! i) Solid is less dense than liquid water ii) Other materials may be different Question: C101 Elementary Chemistry IUPUI Week 1 (1/13) Water has a density of 1.0 g/mL, what is the likely density of oil?  Since we know that oil will float on top of water, it is LESS DENSE than water. Therefore, the likely density of oil could be between 0.80 g/ mL and 1.0 g/mL. Specific Gravity  Density is a ratio of mass and volume Densityof Substance  Specific gravity = Densityof H₂O@4℃ 13.6 g/mL a) Specific gravity of Hg=¿ 1.00 g/mL i) All units cancel out  Hydrometer a) Useful for testing mixtures i) Tests antifreeze in cars ii)Tests urine iiiTests wine Heat Energy  1 calorie = 4.184 Joules (J)  Heat is caused by particles in motion a) Particles = atoms or molecules  Heat is a form of Kinetic Energy Heat Up Move Faster More Kinetic Energy  Example: a) Microwave ovens are tuned to water molecules i) Molecules tumble, temperature goes up ii) Things without water don’t heat up


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