10-2 The Role of Energy

Given the potential energy diagram representing a reaction: Which letter represents the heat of the reaction?

• 1

• 2

• 3

• 4

Tags

NGSS.HS-PS1-4

Which value is defined as the difference between the potential energy of the products and the potential energy of the reactants during a chemical change?

• heat of fusion

• heat of reaction

• heat of deposition

• heat of vaporization

Tags

NGSS.HS-PS1-4

Given the potential energy diagram for a chemical reaction: Which number represents the enthalpy?

• 1

• 2

• 3

• 4

Tags

NGSS.HS-PS1-4

For a chemical reaction, the heat of reaction is equal to the

• potential energy of the reactants, only

• potential energy of the products, only

• potential energy of the products plus the potential energy of the reactants

• potential energy of the products minus the potential energy of the reactants

Tags

NGSS.HS-PS1-4

Given the equation and potential energy diagram representing a reaction: If each interval on the axis labeled “Potential Energy (kJ/mol)” represents 10 kJ/mol, what is the heat of reaction?

• +60 kJ/mol

• +20 kJ/mol

• +30 kJ/mol

• -40 kJ/mol

Tags

NGSS.HS-PS1-4

In a chemical reaction, the difference between the potential energy of the products and the potential energy of the reactants is equal to the

• activation energy

• kinetic energy

• heat of reaction

• rate of reaction

Base your answer to the question on the information and potential energy diagram below.

Chemical cold packs are often used to reduce swelling after an athletic injury. The diagram represents the potential energy changes when a cold pack is activated.

Which lettered interval on the diagram represents the heat of reaction?

• A

• B

• C

• D

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-4

Given the potential energy diagram for a reaction:

Which intervals are affected by the addition of a catalyst?

• 1 and 2

• 1 and 3

• 2 and 4

• 3 and 4

Tags

NGSS.HS-PS1-4

Which potential energy diagram represents the change in potential energy that occurs when a catalyst is added to a chemical reaction?

• 
• 
• 
• 

Tags

NGSS.HS-PS1-4

Given the potential energy diagram for a reversible chemical reaction:

Each interval on the axis labeled "Potential Energy (kJ/mol)" represents 10 kilojoules per mole. What is the activation energy of the forward reaction?

• 10 kJ/mol

• 30 kJ/mol

• 40 kJ/mol

• 60 kJ/mol

Tags

NGSS.HS-PS1-4