Transcript 8.1 Heat Transfer and Types of Energy pptx

Do Now 4/23/14
1. Describe what comes to mind when you think of
energy.
2. How do you get energy?
3. Where do you see energy around you?
Today, we will be able to…
Define the different forms of energy (kinetic,
potential, chemical, thermal) and explain the law of
conservation of energy
Agenda
Do Now
The Brownie Dilemma
Energy and Its Types
Heat Transfer Passage
Heat Transfer Stations
Independent Practice
Exit Ticket
10 min.
5 min.
15 min.
10 min.
25 min.
10 min.
10 min.
The Brownie Dilemma
https://www.youtube.com/watch?v=fBeJPpeeYJQ
Agenda
Do Now
The Brownie Dilemma
Energy and Its Types
Heat Transfer Passage
Heat Transfer Stations
Independent Practice
Exit Ticket
10 min.
5 min.
15 min.
10 min.
25 min.
10 min.
10 min.
ENERGY
• Ability to generate heat or do work
• Heat – energy transferred when a temperature
change occurs
• Work – energy transferred when force is applied to
cause a change in position
• Measured in Joules (J)
Kinetic Energy
• Energy of motion
• Anything that is moving has KINETIC ENERGY
Potential Energy
• Energy stored because of physical position or
chemical composition
• Potential energy is converted to kinetic when stored
energy is released
Chemical Potential Energy
• Energy stored in chemical bonds
• Amount of chemical potential energy is determined
by its composition
• Kinds and positions of atoms
• Kinds and numbers of
chemical bonds
Thermal Energy
• Energy due to random movement of particles
• Temperature – measurement of the average
___________ energy of particles
• What does a change in temperature mean?
Law of Conservation of Energy
• Energy cannot be created nor destroyed, only
transformed
• There is a fixed amount of energy in the universe
• Initial Energy = Final Energy
Observable Forms
of Energy
• Heat
• Light
• Motion
• Sound
• Electricity
Agenda
Do Now
The Brownie Dilemma
Energy and Its Types
Heat Transfer Passage
Heat Transfer Stations
Independent Practice
Exit Ticket
10 min.
5 min.
15 min.
10 min.
25 min.
10 min.
10 min.
How can energy be transferred?
Read the Comparing
Models Passage and
answer questions
independently.
7 minutes
How can energy be transferred?
• Conduction: collision of particles
• Convection: flow of fluids at different temperatures
• Radiation: due to electromagnetic waves
SHOW ME YOUR MOVES
Conduction, Convection or
Radiation?
Agenda
Do Now
The Brownie Dilemma
Energy and Its Types
Heat Transfer Passage
Heat Transfer Stations
Independent Practice
Exit Ticket
10 min.
5 min.
15 min.
10 min.
25 min.
10 min.
10 min.
Agenda
Do Now
The Brownie Dilemma
Energy and Its Types
Heat Transfer Passage
Heat Transfer Stations
Independent Practice
Exit Ticket
10 min.
5 min.
15 min.
10 min.
25 min.
10 min.
10 min.
Independent Practice
1.
2.
3.
4.
What is chemical potential energy?
Where is energy stored in chemical compounds?
Describe the Law of Conservation of Energy.
Describe a real-world example of the Law of
Conservation of Energy that applies to chemistry.
5. List three real-world examples of each type of
heat transfer (conduction, convection, and
radiation).
Agenda
Do Now
The Brownie Dilemma
Energy and Its Types
Heat Transfer Passage
Heat Transfer Stations
Independent Practice
Exit Ticket
10 min.
5 min.
15 min.
10 min.
25 min.
10 min.
10 min.
Exit Ticket
1. Which of the following best describes the
3. A man who was sleeping wakes up because
potential and kinetic energy changes as a car
he hears the smoke alarm go off in his house.
drives to the top of a hill and stops?
Before opening the bedroom door, the man
feels the door to see whether it is warm. He is
A.
Potential energy increases, kinetic energy assuming that heat would be transferred
decreases
through the door to his hand by—
A. Conduction
B.
Potential energy decreases, kinetic energy
increases
B. Convection
C. Radiation
C.
No energy change takes place
D. Compression
D.
Both potential and kinetic energy
decrease
2. An inventor claims to have created an internal 4. Which of these is the best example of heat
combustion engine that converts 100 kJ of
transfer by radiation?
chemical energy from diesel fuel to 140 kJ of
mechanical energy. This claim violates the law of A.
A satellite is warmed by sunlight
the conservation of –
B.
Butter melts on warm bread
A.
Momentum.
C.
A ceiling fan cools a warm room
B.
Inertia.
D.
Puddles of water cool a warm tile floor
C.
Mass.
D.
Energy.