Download presentation
Presentation is loading. Please wait.
Published byMelvyn Stevens Modified over 9 years ago
1
DO NOW…. Which liquid has the highest density? 5 2 3 1 4 Coussement, DeSchepper, et al., Brain Strains Power Puzzles 2002, page 16 least dense 1 < 3 < 5 < 2 < 4 most dense
2
Density Density is an INTENSIVEproperty INTENSIVE property of matter. - does NOT depend on quantity of matter. -Examples: color, melting point, boiling point, odor, density DIFFERENT THAN EXTENSIVE properties - depends on quantity of matter. - mass, volume, length Styrofoam Brick
3
Density M = D x V D = M VM V V = M DM D D M V ensity ass olume
4
Density calculations Density = Mass / Volume Everybody LOVES Density D =
5
Density calculations Density = Mass / Volume “Density breaks my heart” D =
6
Density of Some Common Substances Density of Some Common Substances Substance Density (g / cm 3 ) Air 0.0013* Lithium 0.53 Ice 0.917 Water 1.00 Aluminum2.70 Iron 7.86 Lead 11.4 Gold 19.3 Density of Some Common Substances Substance Density (g / cm 3 ) Air 0.0013* Lithium 0.53 Ice 0.917 Water 1.00 Aluminum2.70 Iron 7.86 Lead 11.4 Gold 19.3 *at 0 o C and 1 atm pressure
7
Consider Equal Masses Equal masses… …but unequal volumes. The object with the larger volume (aluminum cube) has the density. aluminum gold Dorin, Demmin, Gabel, Chemistry The Study of Matter, 3 rd Edition, 1990, page 71 smaller Christopherson Scales Made in Normal, Illinois USA
8
Comparing Densities (g/cm 3 ) Jaffe, New World of Chemistry, 1955, page 66 0.9 0.25 water 1.0 ice cork aluminum 2.7
9
Measuring Volume by Displacement Used for irregularly shaped objects Copyright © Cengage Learning. All rights reserved
10
Density Practice Problems 1.What is the density of carbon dioxide gas if 0.196 g occupies a volume of 100. mL? 0.196 g 100. mL 1.96 x 10 -3 g/mL D = M VM V
11
Density Practice Problems 2.An irregularly shaped stone has a volume of 5.0 mL. The density of the stone is 1.75 g/mL. What is the mass of this stone? 1.75 g/mL x 5.0 mL 8.8 g M = D x V
12
Density Practice Problems 3.A sample of iron has a mass of 94 g and a density of 7.8 g/cm 3. What is the volume of the iron? 94 g 7.8 g/cm 3 12 cm 3 V = M DM D
Similar presentations
© 2025 SlidePlayer.com. Inc.
All rights reserved.