Matter Properties and Composition http://z.about.com/d/chemistry/1/0/x/c/transitionmetalsolns.jpg
Matter
Feb 24, 2016
Matter. Properties and Composition. http://z.about.com/d/chemistry/1/0/x/c/transitionmetalsolns.jpg. So What is Matter?. Anything that occupies space and has mass What isn’t mass? Energy Ideas Sound And…. Properties. - PowerPoint PPT Presentation
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MatterProperties and Composition
http://z.about.com/d/chemistry/1/0/x/c/transitionmetalsolns.jpg
So What is Matter?• Anything that occupies space and
has mass
What isn’t mass?• Energy• Ideas• Sound• And…
Properties• Physical Property - any property that
can be observed without transforming the substance into another substance
mass, color, freezing point• Chemical Property - any property that
cannot be studied without transforming the substance into a different substanceiron rusts, paper burns
Properties• Intrinsic – does not depend on the
amount of material you havecolor, solubility, viscosity, malleability, boiling point, density
• Extrinsic – depends on the amount of mattermass, volume, length
Density• Property derived from two
measurements, mass and volume• Density = Mass/Volume• Will have a unit that contains both
mass and volume such as g/cm3, lb/gal, kg/L
• Does not depend on the size of the sample
Density• What is the density of a sample of
metal that has a mass of 34.58 g and when placed in 15.0 mL of water causes the level to rise to 22.4 mL?
34.58 gMD = = = 4.7 g/ mLV 7.4 mL
22.4 mL - 15.0 mL = 7.4 mL
CHM 1010 PGCC Barbara A. Gage
Changes• Physical Change - change that does
not transform the substance into another substancemelting, subliming, dissolving
Changes• What were the physical changes that
you encountered in activities on Day 2?
Changes• Chemical Change - change that
transforms the substance into another substance
burning, oxidation of metal
• http://jchemed.chem.wisc.edu/JCESoft/CCA/pirelli/pages/cca1NaIHgCl2.html
Chemical Change
CHM 1010 PGCC Barbara A. Gage
From Silberberg, Principles of Chemistry, 2007
Distinguishing Between Physical and Chemical Change
PROBLEM: Decide whether each of the following process is primarily a physical or a chemical change, and explain briefly:
SOLUTION:
(a) Frost forms as the temperature drops on a humid winter night.(b) A cornstalk grows from a seed that is watered and fertilized.(c) Dynamite explodes to form a mixture of gases.(d) Perspiration evaporates when you relax after jogging.(e) A silver fork tarnishes slowly in air.
(a) physical change
(b) chemical change
(c) chemical change
(d) physical change
(e) chemical change
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