Energy in Reactions

Will energy be absorbed or released in the reaction represented by the graph?

• absorbed
• released

Tags

NGSS.HS-PS1-4

Does the graph represent an endothermic or an exothermic reaction?

• endothermic
• exothermic

The energy required to start a reaction is called

• exothermic energy
• activation energy
• chemical energy
• high energy

What is the value of
ΔH for the reaction represented in the graph?

• 20 kJ
• -20 kJ
• 60 kJ
• -60 kJ

How many kilojoules of energy is required to start the forward reaction?

• 20 kJ
• -20 kJ
• 60 kJ
• -60 kJ

Tags

NGSS.HS-PS1-4

Is this reaction more likely to go forward or in reverse?

• forward
• reverse

True or False: All collisions of reactants produce products

• True
• False

Adding more reactants increases the rate of a reaction because it

• Increases number of collisions
• decreases pressure
• increases the energy of the reactants
• increases the speed of the reactants

Increasing the temperature of a reaction increases the rate because...

• it increases pressure
• is slows down the particles
• it increases the amount of energy the reactants have
• it causes fewer collisions

True or False: Increasing the temperature of a reaction has a more significant impact on the rate of product formation than changing concentration.

• True
• False