CHEMISTRY Flashcards
(50 cards)
Which is an example of how chemical
reactions are used?
- Putting out fires.
- Reducing pollution.
- Preventing rust.
A company wants to make better plastic.
They know that changing reaction rates can
affect the plastic’s strength and flexibility.
What should they do?
Control the reaction rates
A food company wants to keep their food
fresh longer. They know that cold
temperatures slow down spoilage. What
should they do?
Make it colder.
A plastic company wants to make stronger,
more flexible products. They know reaction
rates can affect this. What should they do?
Speed up the reaction.
Firefighters are trying to put out a big fire.
They know that removing oxygen or cooling
things down can slow the fire. What should
they do?
Remove oxygen or cool things down.
A car company wants to reduce pollution
from their cars. They know that catalytic
converters can speed up reactions to make
pollution less harmful. What should they
do?
Speed up the reactions
A company wants to prevent rust on their
buildings. They know that coatings can slow
down rust. What should they do?
Slow down the reaction
An engineer is worried about a bridge
rusting. They know that coatings or using a
more reactive metal can slow rust. What else
could they do?
Use a more reactive metal.
To stop a sliced apple from turning brown,
which actions would slow down this
reaction?
Coat the apple slices with lemon juice
Which scenario correctly shows how
chemical reaction rates are used in everyday
life?
Coating metal to slow down rust.
Which action would most effectively improve
air quality in a house?
Use natural cleaning products
In a small kitchen fire, which method would
be most effective in putting out the fire?
Use a fire extinguisher or baking soda.
What can make the air inside a house
cleaner?
Choosing natural cleaning products
instead of ones with chemicals.
What’s the best way to put out a small fire in
the kitchen?
Using a fire extinguisher or baking soda
to cover the fire
What does Boyle’s Law say about gas volume
and pressure?
Volume and pressure are inversely
proportional at constant gas amount.
What happens to gas volume if temperature
increases at constant pressure (Charles’s
Law)?
Volume increases.
How does the kinetic molecular theory
describe gas behavior?
Gas particles move randomly, pressure is
due to particle collisions with container
walls.
What happens to gas pressure when volume
increases at constant temperature (kinetic
molecular theory)?
Pressure decreases due to less frequent
collisions.
A gas in a sealed vessel has a volume of 2.0L
and pressure of 1.0atm. If pressure
increases to 2.0atm at constant
temperature, what is the new volume
(Boyle’s Law: 𝑃1𝑉1 = 𝑃2𝑉2)?
1.0 L
A balloon has a gas volume of 3.0 liters at
300K. If room temperature increases to
600K at constant pressure, what is the new
gas volume (Charles’s Law)?
6.0 L
A scuba divers oxygen tank has a gas volume
of 6.0 liters at 5.0 atm. If pressure falls to 2.5
atm, what is the new gas volume?
12.0 L
A scientist has a sealed container with a
gas volume of 10 L and pressure of 5 atm. If
volume changes to 20 L at constant
temperature, what is the new pressure
(Boyle’s Law: 𝑃1𝑉1 = 𝑃2𝑉2 )?
2.5 atm
A hot air balloon is filled with air. If the air is
heated, what happens to the gas particles
(kinetic molecular theory)?
Particles stop moving, balloon size
doesn’t change.
If decreasing gas volume increases pressure,
which gas law is confirmed?
Boyle’s Law
