Jeopardy

Learning Objectives• Describe solids, liquids, & gases in terms of their

shape, volume, kinetic energy of their particles, & distance between their particles.

• Explain what happens to the particles of a substance during the changes between a solid & liquid, liquid & gas, solid & gas, and vice-versa. Also, apply the terms for these changes to real world examples.

• Explain how the pressure, temperature, and volume of a gas in a sealed container are related & describe what happens on a particle-level for changes in gases.

• Create logical hypothesis, design proper experiments (while controlling certain variables), analyze Gas Law and other data, make claims and back them up with experimental evidence.

RULES1. Questions will be all-play, even the daily

doubles.

2. The teams who answers correctly win the point value of the question except for daily doubles where you lose the number of points you bid if incorrect.

3. There are two daily doubles available.

Let’splay

100

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300

400

500

Final Jeopardy

100 100 100

200200200200

300300300

400400400

500500

States of Matter

Changes of State

Gases Data Analysis & Exp’ts

Leftovers

States of Matter for 100

The state of matter with a definite shape and volume is a _________.

Solid

States of Matter for 200

The state of matter that has no definite shape nor definite volume is a _______, while a ________ has a definite volume but no definite shape.

Gas

Liquid

States of Matter for 300

Describe solids, liquids, in gases in terms of the kinetic energy of their particles.

Solid- lowest KE, Liquids- Medium KE, Gases- Most KE

States of Matter for 400

Describe solids, liquids, and gases in terms of the distance between their particles.

From solids to gases, the particles move further apart.

States of Matter for 500

Liquids: Give an example of a substance with a high viscosity. Also, explain how a student can place a sewing needle on top of a sample of water.

Honey, Glass, etc.- resist flow well

Water’s skin-like surface tension allows more dense objects to seemingly float on its surface.

Changes of State for 100

The phase change from a solid to a liquid is called ________, while the opposite change is called _________.

Melting

Freezing

Changes of State for 200

Soup is gently heating on the stove. What phase change is occurring? What phase change is occurring when the side of your soda can gets wet or looks foggy?

Vaporization (soup)

Condensation (wet soda can)

Changes of State for 300

If you are examining a temperature vs. time graph for the heating of a solid until it becomes a hot liquid, then what will happen to the temperature during the melting process. What will you see on the graph?

Constant temperature (it stays the same)- straight horizontal line of the graph

Changes of StateDAILY DOUBLE!!!

What happens to most substances when heated but not to the point where a phase change would occur? Include what happens to the particles of the substance in your answer.

The substance would expand because the particles start to move more and spread further apart.

Changes of State for 500

Suppose you are cooling a gas down until it turns into a liquid and then into a solid. Explain what will be happening to the particles as this cooling process takes place.

The particles will start to come together more and more, and slow down until they are in close contact vibrating back and forth.

Gases for 100

As gas particles move faster and faster in a sealed, rigid container the _________ inside the container will increase.

Pressure

Gases for 200

As you go higher in altitude, there are fewer air particles. So, what happens to temperature and pressure as you go higher in altitude?

Pressure decreases b/c there are fewer particles, so temperature is lower as well.

Gases for 300

What will happen to your bike tire if it’s left out in the heat? Explain your answer (in terms of what the gas particles will do).

It will inflate because as temp. increases, volume does too. This is due to the particles spreading further apart.

GasesDAILY DOUBLE!!!

What happens to most substances when they freeze (include what the particles are doing in your answer)? Why is water unique when it freezes? Hint- Think about what happens to a soda can when the water inside it freezes.

Most substances contract due to the particles coming closer together. Water is unique in that it expands when it freezes because the particles arrange themselves slightly further apart in the

shape of a hexagon.

Gases for 500As deep sea divers dive downward, gases dissolve in their bloodstream. When they come back up to the surface, they have to do it slowly or risk the severe pains caused by the “bends”. Explain why divers have to do this.

As they ascend, the pressure on the gases in their bodies decreases, so the volume of the gases

increase b/c the gases have more room to expand due to reduced pressure. If they ascend slowly, their body has time to get rid of the gases safely.

Data Analysis & Exp’ts for 100

A substance melts at 0oC and boils at 100oC. What would be a temperature where this substance would be a solid?

-10oC (any temp. below 0oC)

Data Analysis & Exp’ts for 200

Based upon the temperature data, what would be a reasonable estimate for the volume of a sealed gas at constant pressure at 100oC?

115-123 mL

Temp. (oC) Volume (mL)

0 20

25 45

50 68

75 95

100 ?

Data Analysis & Exp’ts for 300

SketchSketch a proper Temperature vs. Volume graph based upon the 1st four temperatures. What is the relationship between temperature and volume?

Line should go up and to the right b/c as temp. goes up,

so does volume

Temp. (oC) Volume (mL)

0 20

25 45

50 68

75 95

100 ?

Data Analysis & Exp’ts for 400

Suppose you are letting water evaporate slowly over time on a warm day. Based upon the data, how much liquid water would be left after 200 minutes?

400 mL

Time (min.) Volume of Water (mL)

0 800

25 750

50 700

75 650

100 600

Data Analysis & Exp’ts for 500Suppose you are designing an experiment to test the effect of salt on water’s boiling point. Describe how you would design the experiment (include any constants and points of comparison/control in your answer).

Determine the boiling point of a sample of regular water and water with salt in it, then compare their boiling points. Determine if the water with salt had a different boiling point than the one withoutone without. This should be done with the same amount of water and in same size container.

Leftovers for 100

Kinetic energy is the energy of __________.

Movement or motion

Leftovers for 200

The change directly from a solid to a gas is called ___________. After washing the dishes and rinsing them with hot water, you decide not to dry them, so they’re still wet. However, after 20 minutes, most of the dishes are completely dry. What phase change occurred?

SublimationEvaporation

Gas Laws

What is kept constant for all of the Gas Laws we discussed? Hint- We discussed relationships for sealed gases.

Number of gas particles