Reaction Energy

What is true of this reaction?

• Equal amounts of energy were released and absorbed

• The reaction released more energy than it absorbed

• The reaction absorbed more energy than it released

Tags

NGSS.HS-PS1-4

What type of reaction is shown in the photo?

• Exothermic

• Isothermic

• Endothermic

• None of the above

Tags

NGSS.HS-PS1-4

How would this reaction be classified?
2Na + Cl₂ → 2NaCl + 25kJ energy

• Exothermic

• Endothermic

• Isothermic

• None of the above

Tags

NGSS.HS-PS1-4

How does an exothermic reaction feel?

• cold

• warm

• You can't feel it

• None of the above

Tags

NGSS.HS-PS1-4

The minimum amount of energy needed for colliding particles to react is called the

• Chemical Energy

• Kinetic Energy

• Activation Energy

• Potential Energy

What do you call the energy that is required to start a reaction?

• Alternative energy

• Activation energy

• Atmospheric energy

Even though the reaction of hydrogen gas with oxygen produces lots of thermal energy, why is it not considered a combustion reaction?

• Carbon dioxide is not a product of the reaction

• Oxygen is a reactant

• Water is a product of the reaction

Tags

NGSS.HS-PS1-7

What is true of the reaction described below?
Br₂ + Cl₂ + 30.0 J of energy  → 2BrCl

• It is exothermic because energy was released.

• It is endothermic because energy is absorbed.

• It is exothermic because energy is absorbed.

• It is endothermic because energy is released.

Tags

NGSS.HS-PS1-4

Energy is _____ when new bonds form.

• absorbed

• released

• lost

• gained

Tags

NGSS.HS-PS1-4

Energy is ______ when bonds break.

• gained

• lost

• released

• absorbed

Tags

NGSS.HS-PS1-4