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Chemical Changes: Burning Coal

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Questions and Answers

What type of change occurs when coal is burned?

Chemical Change (correct)

No Change

State Change

Physical Change

Frying an egg represents a physical change.

False (B)

What happens to the temperature of the surroundings during an explosion when energy is transferred?

The temperature increases.

In a chemical reaction, bonds between atoms in the reactants are ______.

broken Signup and view all the answers

Match the following gas pressure concepts with their descriptions:

Increasing the number of gas particles = More collisions with surface Decreasing the size of the container = More collisions with walls Increasing the temperature = Particles move faster Gas pressure = Result of particle collisions Signup and view all the answers

What type of change occurs when solid wax is heated until it becomes liquid?

Physical Change (D) Signup and view all the answers

The rearranging of molecules is a characteristic of physical changes.

False (B) Signup and view all the answers

What physical change occurred before the explosion illustrated in photo C?

Evaporation Signup and view all the answers

Flashcards

Physical Change

A change in the appearance or state of matter without forming a new substance.

Chemical Change

A change in which a new substance is formed.

Chemical Reaction

Atoms rearrange, creating new substances with different properties.

Particle model (gas)

Explains how gas pressure arises from particle collisions with the container walls.

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Increase gas pressure

Ways to increase the pressure of a gas: More particles, smaller container, higher temperature.

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Symbol Equation

Uses symbols and numbers to represent a chemical reaction; shows the reactants and products with their states.

Chemical Changes: Burning Coal

Choose a study mode

Podcast

Questions and Answers

What type of change occurs when coal is burned?

Frying an egg represents a physical change.

What happens to the temperature of the surroundings during an explosion when energy is transferred?

In a chemical reaction, bonds between atoms in the reactants are ______.

Match the following gas pressure concepts with their descriptions:

What type of change occurs when solid wax is heated until it becomes liquid?

The rearranging of molecules is a characteristic of physical changes.

What physical change occurred before the explosion illustrated in photo C?

Flashcards

Physical Change

Chemical Change

Chemical Reaction

Particle model (gas)

Increase gas pressure

Symbol Equation

Reactants

Products

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