Particle Motion & Arrangement
What happens to particle motion when the temperature increases?
Particle motion increases; they move faster.
What are atoms?
The basic building
blocks of matter.
What does the Law of Conservation of Mass state?
Mass is neither created nor destroyed in a chemical reaction.
What is released or stored during a chemical reaction?
Energy
Describe the different states of matter and how the atoms configured.
Solid: Is packed tightly with some movement.
Liquid: More space and movement but still not super fast.
Gas: Moves quickly with big gaps.
How does pressure
affect the arrangement of particles in a gas?
Increasing pressure compresses the gas,
bringing particles
closer together.
How do
molecules form?
When two or
more atoms
bond together.
How can you demonstrate that atoms in reactants are present in products?
By balancing a chemical equation.
Give an example of a chemical reaction that releases energy.
Combustion of gasoline.
Another name for the law of conservation of mass is-
Law of indestructibility
Describe how particle arrangement changes in a substance when it melts.
Particles move from
a fixed arrangement in a solid to a more fluid arrangement in a liquid.
What is a mixture?
A combination of
two or more substances
combine physical and
retain their
individual properties.
Why is it important to count atoms in a chemical reaction?
Why is it important to count atoms in a chemical reaction?
What is an endothermic reaction?
A reaction that
absorbs energy from
its surroundings.
Is a ice pack an endothermic or exothermic reaction
Endothermic
Explain how temperature changes can affect a system's state of matter.
Higher temperatures can cause solids to melt into liquids, and liquids to evaporate into gases.
What happens to the identities of substances in a compound when a chemical reaction occurs?
They lose their
identities and can only be separated chemically.
What tool can you use to support the Law of Conservation of Mass?
A balance or closed system
How does the
temperature of an exothermic
reaction change?
Decreases
Is breaking a light stick an chemical or physical reaction?
Chemical
How does the kinetic
theory of matter explain changes in state?
It states that as
temperature increases, particle motion increases, leading to changes in state (solid to liquid to gas).
Why is it important
that substances in the universe are made of different types of atoms?
Different atoms combine
in various ways to form
the diverse materials and compounds found in
the universe.
How do chemical reactions illustrate the conservation of mass?
All reactant atoms are rearranged into products without any loss of mass.
Describe an investigation that can demonstrate energy changes in reactions.
Mixing baking soda
and vinegar and measuring temperature changes.
DOUBLE POINTS!
What is the ultimate source of energy that can not be created or destroyed?
The big bang