Watch this commercial for a flameless heater used to cook food. Think about how you think this might work.

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Flameless Heater

• A system can have inputs and outputs, which can be matter, energy, or information.

• Matter or energy cannot be created or destroyed.

• Instead, matter and energy can only be transformed into new forms or move in or out of the system.

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Energy Flow in Systems

There are many different types of energy that can be involved in a system. Let's look at some examples in a car!

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Types of Energy

Chemical energy is released when gasoline and air react with each other inside the engine.

Chemical Energy

The chemical energy is converted into kinetic energy which is used to move the car.

Kinetic Energy

The chemical energy released by the gasoline-air reaction is converted into thermal energy, which causes the engine to get hot!

Thermal Energy

Thermal Energy in Reactions

We will see how reactions can have energy flow in or out in the form of thermal energy.

• All matter is made up of tiny particles that are in constant motion.

• Particles move faster when the object is warm than when the object is cold.

• When thermal energy flows from one object to another, it always flows from the warmer object to the cooler object.

• This is known as heat!

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Types of Energy Transfer