PE diagrams

A ______________ is a substance that increases the rate of a reaction without being used up during the reaction. 

• catalyst
• product
• reactant
• solute

Tags

NGSS.HS-PS1-5

Exothermic reactions release heat energy to the surroundings.

• true
• false

Tags

NGSS.HS-PS1-4

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

• The maximum amount of energy used
• The minimum amount of energy required form the activated complex
• The energy of the reactants
• The energy possessed by the products

Tags

NGSS.HS-PS1-4

In an endothermic reaction the products have 

• more energy than the reactants
• less energy than the reactants
• the same energy as the reactants
• no energy

Tags

NGSS.HS-PS1-4

In an exothermic reaction the products have

• more energy than the reactants
• the same energy as the reactants
• less energy than the reactants
• no energy

Tags

NGSS.HS-PS1-4

B represents

• potential energy of the reactants
• potential energy of the products
• activation energy of the forward reaction
• heat of reaction (enthalpy)

Tags

NGSS.HS-PS1-4

C represents

• enthalpy
• energy absorbed
• activation energy of the reverse reaction
• potential energy of the activated complex

Tags

NGSS.HS-PS1-4

In terms of energy, how would the forward reaction be described?

• Endothermic
• Exothermic

Tags

NGSS.HS-PS1-4

In terms of energy, how should the forward reaction be described?

• Endothermic
• Exothermic

Tags

NGSS.HS-PS1-4

Which letter represents the heat of reaction (enthalpy)?

• A
• B
• C
• D

Tags

NGSS.HS-PS1-4