solids, liquids, gases
DESCRIPTION
Solids, Liquids, Gases. Ch 16 09-10. Phase Change Graphs. Shows the temperatures at which substances change from solids to liquids, liquids to gases Can show time or energy needed to make the changes. Phase changes - Adding energy. Phase changes – Giving Off energy. - PowerPoint PPT PresentationTRANSCRIPT
Phase Change GraphsShows the temperatures at which
substances change from solids to liquids, liquids to gases
Can show time or energy needed to make the changes
Phase changes - Adding energy
Phases Change Example
Solid liquid Melting Ice water
Liquid Gas Boiling Water steam
Solid Gas SublimingDry ice CO2
Gas
Phase changes – Giving Off energy
Phases Change Example
Liquid solid Freezing water ice
Gas liquid Condensing steam water
Gas solid DepositingWater vapor
frost
During a phase change, such as melting or boiling, the Temperature remains the same.
During a phase change, such as melting or boiling, the energy is changing.
On the phase change graph, the energy/time is the independent variable.
On the phase change graph, the temperature is the dependent variable.
Variable Units
m = mass g
V = volumeLiquids - mL
Solids - cm3
D = densityLiquids – g/mL
Solids – g/cm3
If a block of tungsten has a mass of 97 g and a volume of 5 cm3, what is the density of the tungsten block?
Ice has a density less than water. If you have a 34 g block of ice with a volume of 38 mL, what is the density of the ice block?
Floating VS Sinking
Water’s density is 1g/mL.Objects density < 1 will float in waterObjects density > 1 will sink. in water
Viscosity – DEF: Resistance to flow
High viscosity pours slowly
EX:
Low viscosity pours fast/easily
EX:
Thermal ExpansionDEF: A substance increase in
size as temperature increasesIt will decrease in size as the
temperature decreases
Thermometers As temp rises, fluid takes up
more spaceHot Air Balloons
As temp rises, air less dense, Hot Air Balloon moves upward
Bridge JointsAs road expands, would
push up if no place to go