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WorksheetsChemistry Test: Physical vs. Chemical Properties & Changes
Total questions: 75
Worksheet time: 37mins
Chemistry is the study of:
matter
properties of matter
the changes matter undergoes
all the other answers are correct
Chemistry is the study of _____________, its ________________, and the ______________ it undergoes.
(a)
When a system is open it allows for:
particles to enter or exit
energy to enter or exit
both particles & energy to enter or exti
none of the other answers are correct
When external pressure on a system is decreased, like with respect to the marshmallow or water in the vacuum chamber:
volume of the system increases
volume of the system decreases
volume is never affected during change in pressure
Physical changes:
are usually more reversible than chemical changes
do not produce new chemicals
can sometimes be endothermic or exothermic
all the other answers are correct
Chemical changes:
produce new chemicals
do not produce new chemicals
are only exothermic
are only endothermic
(a) properties are traits which have to do with producing new chemicals.
Chemical properties include for example:
flammability
combustibility
reactivity with acids
all the other answers are correct
Physical properties for example would include:
conductivity
ductility
boiling point
melting point
all the other answers are correct
(a) is anything that has mass and takes up space (aka has volume).
Matter:
has mass
takes up space (aka volume)
in chemical pieces is called particles
all the other answers are correct
Indicators or hints of a chemical change include:
new color
new light
new heat
new solid
all the other answers are correct
Which of the following is an example of a chemical change?
burning a fuel
freezing water
shape change
size change
temperature change
State changes like melting, freezing, boiling, condensation, sublimation... are all (a) changes.
On a heating curve what sort of changes are occurring on the plateaus or flat parts?
state change
shape change
temperature change
average kinetic energy change
As you add heat to a state of matter and move up the inclines of a heating curve:
particles are moving faster in that state of matter
there is a state change
there is a chemical change
there is no temperature change
Solid, liquid, and gas:
are states of matter, and each has its own main type of motion and spacing of particles
have the same temperature ranges
have the same main types of particle dance
have equally spaced particles
have the same density
Temperature is:
the absolute amount of energy measured in kilojoules
an average amount of potential energy measured in kilojoules
an average amount of kinetic energy measured in degrees Celsius or Kelvin
Particles in a solid state move in what type of dance motion?
vibration
sliding (aka translational motion)
colliding & spreading
none of the other answers is correct
Particles in a liquid state move in what main type of dance motion?
vibration
sliding (aka translational motion)
colliding and spreading
none of the other answers are correct
Particles in a gas state move in what main type of dance motion?
vibration
sliding (translation motion)
colliding & spreading
none of the above
Hydrocarbon fuels burn in the presence of oxygen gas in an open system to make new substances: carbon dioxide and (a) .
Halogens are the 2nd most reactive vertical column on the Periodic Table. Halogenated compounds often are hazardous and must be disposed of carefully and with certain chemical procedure. Which of the following elements is not a halogen element?
Cl (chlorine)
F (fluorine)
O (oxygen)
Br (bromine)
I (iodine)
With respect to the metalloid staircase or zig-zag line on the Periodic Table, where are the metals located?
to the left
to the right
both on the left and right
Which state of matter is most compressible?
solid
liquid
gas
"When more energy goes into a chemical system than leaves that system" describes only:
an endothermic change
an exothermic change
a chemical change
a physical change
Burning is:
an endothermic change
an exothermic change
a change where the energy neither enters nor leaves the chemical system
(a) is the amount of matter, often measured in grams.
A synonym for combustion is:
melting
neutralization
burning
boiling
decomposition
In your candle burning lab, the flame _________ _____, because ___________ was used up, which then also resulted in a decrease in temperature and ________________ within the closed system.
went out, oxygen, pressure
went out, hydrocarbon fuel, number of particles
got larger, heat, freezing
spread out, carbon dioxide, constant volume
All combustion flames:
are burning throughout its volume
are endothermic changes
are hollow, meaning they burn only on the outside where the fuel react with oxygen gas
are one color and only one color at a time
What is the state of matter that mainly burns during hydrocarbon combustion?
solid
liquid
gas
pumpkin
Why did most classes on average find that burning the marshmallow lowered in mass?
mass gets destroyed during all chemical changes
mass gets destroyed in flames during burning
mass of oxygen recombined with the atoms of the fuel and stayed on the electronic balance (aka digital gram scale) stage
mass of oxygen recombined with the atoms of the fuel and left the electronic balance (aka digital gram scale) stage and went into the air as CO2 (g) and H2O (g).
What caused the paint can lid to pop off in the exploding can demo?
decreased temperature
decreased number of oxygen particles
increased pressure
the large flame that existed throughout the inside of the paint can
Temperature and pressure:
are not important variables to chemical behavior
are directly proportional (related)
are inversely proportional (related)
never affect each other in a chemical system
Pressure and volume:
are directly proportional (related)
are inversely proportional (related)
do not ever affect each other in a chemical system
_______________ is the force per area of particle collision.
pressure
volume
temperature
kinetic energy
In a particle diagram an increase in the velocity of many gas particles colliding:
can be represented by a smaller arrows drawn on particles in the diagram
results in an increase in gas particle pressure
represents a decrease in the temperature of that system
Sublimation is an _________________ change that results in changing from a solid to a ____________.
exothermic, liquid
exothermic, gas
endothermic, liquid
endothermic, gas
Where in a burning candle does liquid wax physically change into gaseous wax?
the pool of liquid wax at the top of the candle
the top of the wick
the bottom of the wick
in the solid part of a candle
The concept of how a "trick candle" works suggests that:
all fuels burn at the same temperature
fuels burn at different respective temperatures
heat cannot transfer between different flammable fuels
burning is an endothermic change
The first classification of matter is into the categories of either:
physical or chemical
endothermic or exothermic
substance or mixture
element or compound
Chemical substances are most directly categorized as either:
elements or compounds
mixtures or matter
happy or sad
Metals, like copper, are _________________. and non-metals, like argon, are potential _________________.
not proper, not there
conductors, insulators
insulators, conductors
Chemical particles in the liquid state:
keep their own shape
have a shape that is determined by their container
have higher energy than gas particles of the same chemical type
have no kinetic energy
Freezing liquid water into solid ice is:
a chemical change that is endothermic
a chemical change that is exothermic
a physical change that is exothermic
a physical change that is isothermic
What is the chemical formula for carbon dioxide?
CO
CO2
H2O
C
CH4
The chemical formula for ice water is:
H
H2
H2O
C3H8
When one measured variable goes up in value while another measured variable goes up at the same time in a chemical system, we say that these variables are:
inversely proportional (related)
directly proportional (related)
What is the shape of a flame that exists in little or no gravity?
like a tear drop shape like most flames
like a cylinder
like an eagle's wing
spherical
What does a fuel usually need around it to successfully burn other than a spark (aka activation energy)?
oxygen (g)
oxygen (s)
carbon dioxide (g)
carbon dioxide (s), aka "dry ice"
Which state of matter is usually most dense and therefore has its particles most tightly packed.
(s)
(l)
(g)
How is water different from almost all other chemicals with regards to its respective solid and liquid state?
Water's solid particles are more tightly packed, but most other solid chemical types are usually not as tightly packed
Water's liquid particles are more tightly packed than its solid state
Water does not have a liquid state usually at room temperature
When you heat up a gas, its particles mainly:
collide & spread slower
collide & spread faster
slide past each other slower
vibrate slower
In our particle diagrams, longer arrows mean:
higher velocities of particles, but lower pressure of particles
higher velocities of particles and higher pressure of particles
lower velocities of particles and lower pressure of particles
When one measured variable increases its value while another measured variable decreases its value, we say that these two variables are:
inversely proportional (related)
directly proportional (related)
It is possible to change the boiling point of chemicals by changing the external pressure around those chemicals.
true
false
What would be a way to lower the average velocity of particles of oxygen (g)?
Add external pressure to the system
Lower the temperature of a system
Raise the temperature of a system
What are the two states of matter that usually exist at a melting or freezing point temperature of wax?
solid and gas
liquid and gas
solid and liquid
Particle counts do not change during physical changes, but they might change during chemical changes.
True
False
Pressure change is a:
physical change
chemical change
Tarnishing silver is due to the chemical combination of silver with particles of solid sulfur in the air. When this happens, shiny silver becomes blackish in color.
This scenario describes a physical form change, but it indicates that there is a:
chemical change
physical change
class change
state change
Which of the following scenarios describes particles that are most orderly?
solid wax
liquid wax
gas wax
the new chemicals (aka "products") of burning wax
Marie: "Why did you decide not to grab the fire extinguisher and fight the fire?"
What should have been your answer to this question in the Chemistry Safety lab?
Too dangerous.
There was no extinguisher
I needed to save my science 100 page composition notebook.
It's electrical and I already turned it off.
An oxidizer or oxidizing reagent (aka "reactant") is a chemical like oxygen that cuts up and combines with a flammable or combustible fuel to produce new chemicals (aka "products") like carbon dioxide and water. You need and oxidizing agent there for the fuel to be able to catch on fire.
Your lab partner Marie notices you are reviewing potential hazardous chemicals in your lab.
Marie: "I remember you struggled a bit with the hazard symbols. Do you remember the symbol for oxidizing reagents?"
A circle with flames
A person with symptoms
A square with fragments
An exclamation mark
If a chemical is "volatile" at higher temperatures of a room, like alcohol or finger nail polish remover, then that means the chemical can easily turn into what physical form?
solid
liquid
gas
Which of the following is a way to be more successful in the classroom?
Taking good notes in your science notebook.
Having my cell phone out during class.
Talking during instruction.
Playing games, videos, and music during instruction.
Heads down or sleeping during classtime.
What is the freezing point of water?
0 degrees Celsius
32 degrees Celsius
100 degrees Celsius
25 degrees Celsius
What happens if you add heat using the heater?
particles will slow down
more particles will condense
more particles will freeze
particles may speed up and some may change to a gas
What state of matter is shown here?
Zoom in if you want to.
solid neon
liquid oxygen
gaseous water
In our Paint Can Demo we made many observations in the last stage of change. Which of the following ways could result in the lid blowing off of this canister. See image.
Decrease the number of gas particles by somehow causing a leak in the canister.
Decrease the temperature of the system.
Heat up the canister to a higher temperature.
Why is a gas state of a fuel effective at catching fire and burning?
Gas fuels have more surface area than liquids and solids, because their particles are spread out more than other states. This allows for more efficient reaction with oxygen.
Solid fuels are more orderly in their particles. They typically have less surface area than other states. This allows for more efficient reaction with oxygen.
Liquid fuel particles mainly slide past each other. Sliding is the most effective motion for promoting burning. This allows for more efficient reaction with oxygen.
What is the state with the highest volume and average kinetic energy?
solid
liquid
gas
Isolated systems are difficult to construct. What is true about isolated systems?
Only particles can travel in or out of the system
Only energy can travel in or out of the system
Both particles and energy can travel in or out of the system
Neither particles nor energy can travel in our out of the system
People are what type of system?
open
closed
isolated
