Rate of Reaction and Enthalpy

The higher the concentration of a solution, the __________ the rate of reaction.

• decreases

• stabilizes

• increases

• does not affect

Tags

NGSS.HS-PS1-5

The larger the surface area, the __________ the rate of reaction.

• decreases

• stabilizes

• increases

• does not affect

Tags

NGSS.HS-PS1-5

At higher temperatures, the particles have more __________ energy, so __________ more frequently.

• kinetic; collide

• potential; expand

• chemical; react

• thermal; dissolve

Tags

NGSS.HS-PS1-5

Catalysts increase the rate of reaction but are not __________.

• expensive

• consumed

• required

• reusable

What type of reaction is this?

• Endothermic
• Exothermic

Tags

NGSS.HS-PS1-4

What letter represents the activation energy?

• A
• B
• C
• D

Tags

NGSS.HS-PS1-4

Activation energy is required to start a chemical reaction. What is activation energy?

• The energy needed for a reaction to occur
• The minimum amount of energy needed for a reaction to potentially occur
• The energy added by a catalyst
• The energy possessed by the products

Grinding a seltzer tablet into powder increases the rate of reaction due to increased

• concentration
• surface area
• temperature
• reactants

Which factors increase the rate of a reaction.

• increasing temperature
• increasing concentration
• increasing surface area
• all of these

Tags

NGSS.HS-PS1-5

Exothermic reactions release heat to the surroundings.

• true
• false

Tags

NGSS.HS-PS1-4