Potential Energy and Activation Energy Graphs

In the reaction depicted in the diagram,

• the energy content of the products is greater than the energy content of the reactants

• the energy content of the reactants is the same as the energy content of the products

• the energy content of the reactants is greater than the energy content of the products

Tags

NGSS.HS-PS1-4

The activation energy (E_a) of this reaction is ___ kJ

• 40

• -80

• 80

• 240

• -240

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-1

The line that represents the heat of reaction (ΔH) of this reaction is

• A

• B

• C

• D

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-4

The reaction whose energy diagram is shown here is

• Exothermic

• Endothermic

• Isothermic

Tags

NGSS.HS-PS1-4

The heat of reaction (ΔH) of this reaction is

• 240 kJ

• 160 kJ

• -80 kJ

• -160 kJ

• 80 kJ

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-4

If a catalyst were added to this reaction, which lines would change?

• A only

• B only

• C only

• B and D

• A and C

Tags

NGSS.HS-PS1-4

NGSS.HS-PS1-5

The heat content of the products is

• 80 kJ

• 160 kJ

• 240 kJ

• 100 kJ

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-4

If you were holding in your hand a test tube in which the reaction above is taking place, it would

• feel hot, because energy is being absorbed

• feel cold, because energy is being absorbed

• feel hot, because energy is being released

• feel cold, because energy is being released

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-4

The line that represents the activation energy (E_a) of this reaction is

• E

• D

• C

• B

• A

Tags

NGSS.HS-PS1-4

The line that represents the heat of reaction (ΔH) of this reaction is

• A

• B

• C

• D

• E

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-1