Chemical Reactions and Energy Concepts

Why do cars run on gasoline and not rocket fuel?

• Rocket fuel is too powerful for cars.

• Gasoline is more expensive than rocket fuel.

• Cars are designed to fly with rocket fuel.

• Rocket fuel is safer for the environment.

What is rocket fuel primarily made of?

• Oxygen

• Hydrogen

• Carbon

• Nitrogen

What does hydrogen fuel release when it combusts?

• Carbon dioxide

• Methane

• Water emissions

• Sulfur dioxide

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Why is hydrogen fuel not commonly used in cars?

• It is too cheap

• It is hard to make

• It is too stable

• It emits too much CO2

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What does gasoline emit when it is used as fuel?

• Water

• Oxygen

• CO2

• Hydrogen

Compared to petroleum products, how much energy does hydrogen release?

• Less energy

• The same amount of energy

• A ton more energy

• No energy

What are the four strokes of an engine?

• Intake, Compression, Power, Exhaust

• Ignition, Compression, Power, Release

• Intake, Expansion, Power, Release

• Ignition, Expansion, Power, Exhaust

What does the law of conservation of energy state?

• Energy is created and destroyed

• Energy is not created or destroyed

• Energy is only created

• Energy is only destroyed

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What type of energy is associated with heat?

• Thermal energy

• Mechanical energy

• Kinetic energy

• Potential energy

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What happens to air particles in a syringe when heated in warm water?

• They move faster, causing the plunger to go up

• They move slower, causing the plunger to go down

• They remain stationary

• They cause the syringe to explode

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