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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.

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matter

Matter

Properties and Composition

http://z.about.com/d/chemistry/1/0/x/c/transitionmetalsolns.jpg

so what is matter
So What is Matter?
  • Anything that occupies space and has mass

What isn’t mass?

  • Energy
  • Ideas
  • Sound
  • And…
properties
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 substance

iron rusts, paper burns

properties1
Properties
  • Intrinsic – does not depend on the amount of material you have

color, solubility, viscosity, malleability, boiling point, density

  • Extrinsic – depends on the amount of matter

mass, volume, length

density
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
density1
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?
changes
Changes
  • Physical Change - change that does not transform the substance into another substance

melting, subliming, dissolving

changes1
Changes
  • What were the physical changes that you encountered in activities on Day 2?
changes2
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
Chemical Change

From Silberberg, Principles of Chemistry, 2007

CHM 1010 PGCC Barbara A. Gage

slide12

PROBLEM:

Decide whether each of the following process is primarily a physical or a chemical change, and explain briefly:

Distinguishing Between Physical and Chemical Change

(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.

SOLUTION:

(a) physical change

(b) chemical change

(c) chemical change

(d) physical change

(e) chemical change