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What is Energy?
What is Energy 2?
Form of Energy
Forms of Energy 2
Energy Transformations
100

What gives us the ability to do work or cause change?

What is energy

100
Mechanical Energy is the ______ or total of the potential and kinetic energy in an object.
Sum
100
Food, paper, wood, batteries - these are examples of objects that have stored potential energy in them. What kind of energy?
What is chemical energy
100

Harry uses a pulley to put up a bucket of water from a well. What energy transformation takes place as the bucket is lifted up out of the well?

As the bucket rises, kinetic energy is transformed to potential energy

100
What energy transformations take place when you use a flash light?
chemical (in the batteries) --> electrical (in the wires) --> light (in the bulb)--> heat (comes from the bulb)
200

The Law of Conservation of Energy tells us that Energy is not _________________ . It can only be _________ from one kind of energy to another.

created nor destroyed. transformeed

200

What is calorimetry? What is the device used to measure this?

The science of measuring heat transfer when a substance absorbs or gives off heat; calorimeter. 

200

What kind of energy transformation takes place in a campfire?

Chemical energy is transformed into heat and light energy

200
Whenever there is friction between the air and an object, the ground an an object, or two objects what kind of energy is produced?
Thermal/Heat
200

At what point does a roller coaster have the most kinetic energy?

At the bottom of the biggest hill

300

The enthalpy change of a reaction can be calculated using the following equation:

ΔH = (sum of enthalpies of reactants) - (sum of enthalpies of products)

300

As something gets lifted higher off the ground, its _______  _______ increases

Potential Energy

300
The type of energy that is formed when particles of solid, liquid or a gas vibrate.
What is sound energy?
300
Thermal energy is also what type of energy?
What is heat energy
300
Where would a skateboarder be in the pipe when they have the greatest Potential energy?
At the top on either side.
400

 At the melting point of a substance, temperature ________ as heat is being added and the substance is changing from a solid to a liquid.

Remains constant

400

Given that the enthalpy of fusion for water is 334 J/g. Find the mass of water that has been converted to ice if the heat released was equal to 7800 J.

24 g

400
Energy that travels in wires is
electrical energy
400
People eat food such as an apple because it possesses what type of energy before its eaten.
What is Chemical Energy
400

Tabitha ate a turkey sandwich and an apple for lunch. Later that day, she ran 2 miles during soccer practice. Which of the following energy transformations occurred between lunchtime and the end of Tabitha’s run?

Chemical energy was converted to mechanical energy.

500

Draw the molecule:

CH3COOC2H5

Mr. Gonzalez will determine the winner. 

500

Calculate the enthalpy in the reaction below:

C2H2 (g) + 2H2 (g) --> C2H6(g)

H-H (432 kJ/mol)

C(triple)C (839 kJ/mol)

C-H (413 kJ/mol)

C-C (347 kJ/mol)

-296 kJ/mol; exothermic

500

Who has more kinetic energy, a person running 5 miles per hour or a person running 10 miles per hour? Why?

The person running 10 miles per hour, because their speed is higher

500

Any energy that travels in waves, such as heat, microwaves, ultraviolet light and others is called

Electromagnetic energy

500

At what point does a roller coaster have the most potential energy?

At the top of the biggest hill