Unit 6 Chemistry Test

What is the definition of a Chemical Change?

• Any change in state without changing actual properties of substance

• A change in chemicals

• A change that occurs when one or more substances change into new substances with different properties.

• A change in between states

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What is the definition of an endothermic reaction?

• A reaction that absorbs energy(cold)

• A reaction that keeps energy in

• A reaction that does not produce a change in temperature

• A reaction that releases energy

Tags

NGSS.HS-PS1-4

What is the definition of a physical change?

• A change of state

• When a substance changes into a different one

• Any change in state without changing actual properties of substance

• When a substance only changes the physical state

Chemical Energy is

• Energy stored in the bonds of chemical compounds.

• Energy stored in atoms

• The energy found in molecules

• Not real

Tags

NGSS.HS-PS1-4

NGSS.HS-PS1-2

When braking bonds, energy is ______

• released

• absorbed

• given off in light

• put away

Tags

NGSS.HS-PS1-4

Exothermic reactions occur when...

• Energy is absorbed

• Energy is destroyed

• Energy is released

• Energy is transferred

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-1

Which is the proper form for a synthesis reaction?

• AB->A+B

• AB + CD --> AD + CB

• AB + C --> AC + B

• A+B-->AB

What is the proper form for a single replacement reaction?

• AB + CD --> AD + CB

• AB + C --> AC + B

• A+B-->AB

• AB->A+B

What is the proper form for a decomposition reaction?

• AB + C --> AC + B

• AB + CD --> AD + CB

• AB->A+B

• A+B-->AB

What is LeChatelier's Principle

• if a stress is applied to a system at equilibrium, the system will shift to reduce the stress

• if a heat is applied to a system at equilibrium, the system will shift to reduce the heat

• Matter cannot be created nor transformed, only converted

• if no heat is applied to a system at equilibrium, the system will not shift