Catalyst•Briefly describe potential energy. What is

its formula?•Briefly describe kinetic energy. What is its

formula?•Briefly describe conservation of energy.

What is an example where you would see it happening?

At which point in energy transformation will the system run out of energy?(Will there be enough energy after “said” events?)

Entropy is 1. The measure of disorder in

a system 2. The amount of non-usable

energy in a system

Write the following (Cornell notes style) into your INB

What is a system?

• A system is any object or set of objects going through a reaction

Law of Entropy•states that the entropy (disorder) in a system will always increase

Entropy = the measure of disorder in a systemLow Entropy = OrganizedHigh Entropy = Disorder, Disorganized

Entropy = the measure of disorder in a systemLow Entropy = OrganizedHigh Entropy = Disorder, Disorganized

Entropy = the measure of disorder in a systemLow Entropy = OrganizedHigh Entropy = Disorder, Disorganized

On your left-side (processing) page, draw the example (the two boxes) and write notes/captions

What does the Law of Entropy state? Law of entropy: in any

reaction, _______________________

What does that mean?

What does the Law of Entropy state? Law of entropy: in any reaction,

entropy will always increase

What does that mean? Some energy will always transform into a non-usable form

What’s happening to the energy?

Potential Energy

Potential Energy

Potential Energy

Kinetic Energy

Kinetic Energy

Kinetic Energy

What’s happening to the energy?Energy is being transformed between PE and KE. However, becoming less with each bounce.Where is the energy going: what other forms of energy are part of this system?

Potential Energy

Potential Energy

Potential Energy

Kinetic Energy

Kinetic Energy

Kinetic Energy

What’s happening to the energy? The “lost” PE was transformed to non-usable energies: sound and thermal.

Potential Energy

Potential Energy

Potential Energy

Kinetic Energy

Kinetic Energy

Kinetic Energy

Sound Energy

Thermal Energy

What does the Law of Entropy state? Law of entropy: in any reaction,

entropy will always increase

What does that mean? Some energy will always transform into a non-usable form

Re-usable energy: forms of potential and kinetic energy that can be re-used and transformed

Non-usable energy: energy that is lost to the universe

Law of entropy: in any reaction, entropy will always increase, meaning some energy will always transform into a non-usable form

Potential Energy▫Chemical energy

▫Gas for motor, batteries

▫Food▫Nuclear ▫Gravitational

potential energy ▫Elastic potential

energy

Kinetic Energy▫Mechanical energy▫Electromagnetic

(solar, light, radiant)

▫Electrical energy▫Sound▫Thermal (heat) Thermal

energy (movement of molecules) = KE

▫

Forms of Energy

•Energy spontaneously disperses from being localized to becoming spread out if it is not hindered from doing so.

•Example: Air in a high-pressure tire shoots out from even a small hole in its side to the lower pressure atmosphere.

•A hot pan contains lots of thermal energy. Apply the Law of Entropy and explain how it cools down.

http://entropysite.oxy.edu/students_approach.html

Examples of Entropy (copy the following to practice being able to draw the flow of energy)

Energy Bomb Exploding Energy

Input OutputUsable Non-

usable

chemical

Kinetic

Thermal (heat)

Sound(explosion)

Electro-magnetic (light)

Examples of EntropyEnergy Watching TV Energy

Input OutputUsable Non-

usable

Electrical(from the outlet)

Electromagnetic (light)

Sound

Thermal (heat)

Examples of EntropyEnergy Car Driving Energy

Input OutputUsable Non-

usable

Chemical(from the gas & battery)

KineticThermal (heat from friction: tires, engine)Sound (tires, engine)Electromag.(head lights)

REVIEW: SSP ½ sheet1. The law of entropy states that energy

tends to become _______. (useable? or unusable?)

2. In a system, is useable energy the input or the output?

3. Create a diagram showing the flow of energy for an electric fan.

art.bradley.edu

Chemical energy from the food we eat

Independent Practice ws

art.bradley.edu