Download Chemical Energy

Survey
yes no Was this document useful for you?
   Thank you for your participation!

* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project

Document related concepts
no text concepts found
Transcript
Bellringer
Do not write the question….
Identify the following as conduction,
convection, or radiation.
1.
2.
3.
4.
5.
6.
Getting your hands warm by a campfire
Touching a hot pan from the oven
The sun warms the sand on a beach
Boiling water to make macaroni
Holding a cup of hot coffee in your hand
Heating air inside of a hot air balloon
Review
__________ is the ability to cause
change.
– A. Work
– B. Energy
– C. Power
– D. Velocity
Review
__________ is the energy stored in an
object due to its position.
– A. light energy
– B. kinetic energy
– C. potential energy
– D. thermal energy
Review
__________ is a form of energy an
object has if it is moving.
– A. Potential Energy
– B. Kinetic Energy
– C. Chemical Energy
– D. Thermal Energy
Review
If the particles in an object begin to
move more quickly, their average kinetic
energy __________ and the object's
temperature __________ .
– A. Increases; rises
– B. Increases; drops
– C. Decreases; rises
– D. Decreases; drops
Review
The transfer of energy that occurs when
you touch a hot object and you are
burned is called:
– A. radiation
– B. conduction
– C. convection
– D. thermal
Review
The transfer of energy that allows you to
get warm while sitting next to a fire is
called:
– A. radiation
– B. conduction
– C. convection
– D. thermal
Review
When energy changes from one form to
another, the total amount of energy:
– A. increases
– B. decreases
– C. stays the same
– D. depends on the type of energy
Review
Which of the following is NOT a form of
energy?
– A. Chemical
– B. Thermal
– C. Kinetic
– D. Friction
Review
__________ is a measure of the
average kinetic energy of all the
particles in an object.
– A. thermal
– B. temperature
– C. density
– D. conduction
Review
Heat is the thermal energy that flows
from a material with a _____
temperature to one with a _____
temperature.
– A. high; low
– B. low; high
– C. low; low
– D. high; high
Review
These currents help your soup to warm
evenly over a burner:
– A. chemical
– B. conduction
– C. thermal
– D. convection
Study Pack #7
Today’s Goals…
I can explain how energy is involved in
chemical reactions.
Page 178
Chemical Reactions
A change in matter that forms a new
substance is called a chemical change
– The new substance is made of the same
elements as the original substance but in
different combinations
Chemical Reactions
A chemical change is a chemical
reaction
What are some of the chemical
reactions going on around you?
Energy in Chemical Reactions
Every chemical reaction involves a
change of energy
– Release energy or absorb energy
– Recall the signs of a chemical change
Energy in Chemical Reactions
If it releases energy it is called an
exothermic reaction
– A car engine
– Burning oil, coal, gas in your home for heat
Energy in Chemical Reactions
If it absorbs energy it is called an
endothermic reaction
– Baking cookies
What did you learn?
True or False
– A chemical reaction is a chemical change.
– New substances can be produced in
chemical reactions.
– A chemical reaction that absorbs energy is
called an exothermic reaction.
– Baking cookies is an example of an
endothermic reaction.