Density What is density Density The measurement of

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Density!!!

Density!!!

What is density? ? Density: The measurement of how tightly packed matter is within

What is density? ? Density: The measurement of how tightly packed matter is within an object Or … how compact an object is

 All substances have density including liquids, solids, and gases Density is the measure

All substances have density including liquids, solids, and gases Density is the measure of the “compactness” of a material

 In general, density will increase as you change from a gas to liquid

In general, density will increase as you change from a gas to liquid to solid Density and States of Matter

Factors affecting Density Temperature Pressure

Factors affecting Density Temperature Pressure

Factors effecting density …. 1. ) TEMPERATURE When an object is heated, it will

Factors effecting density …. 1. ) TEMPERATURE When an object is heated, it will usually expands (increases in volume) But… the mass will remain the same So…. . The density of a heated object will DECREASE

Factors Effecting Density 2. ) PRESSURE In general, as pressure is increased on solids

Factors Effecting Density 2. ) PRESSURE In general, as pressure is increased on solids and gasses, the volume will decrease So…. . Density will INCREASE as pressure increases Liquid is not included because it will not compress

How to calculate density? Mass Volume Mass = grams (how much matter is in

How to calculate density? Mass Volume Mass = grams (how much matter is in an object) Density = Volume = 1. ) Regular shaped object = L x W x H (units = cm 3) 2. ) Irregularly shaped object = Use the water displacement method

 Density is independent of size and shape! What does that mean? ? 2

Density is independent of size and shape! What does that mean? ? 2 g / 4 cm 3 = 0. 5 g/cm 3 Now cut that sample in half … what will happen to the density? ? 1 g / 2 cm 3 = 0. 5 g/cm 3 The density stays the same!!! UNLESS THE TEMP. OR PRESSURE CHANGES DENSITY REMAINS THE SAME!

How to manipulate the density formula to calculate Mass and Volume when density is

How to manipulate the density formula to calculate Mass and Volume when density is known M D V