Endothermic and Exothermic Reactions

Endothermic and Exothermic Reactions

Multiple Choice

How do you calculate Enthalpy of a reaction?

• ΔH = ΔH_products - ΔH_reactants

• ΔT = q / mC

• ΔG = ΔH -TΔS

• E = mc²

Multiple Choice

Using the table of average bond energies below the image, the ΔH for the reaction in kJ is.....

• + 160 kJ

• -63 kJ

• - 160 kJ

• -217 kJ

Multiple Choice

ΔH value in an endothermic reaction is a positive number.

• True
• False

Multiple Choice

During an endothermic reaction in a beaker if we are part of the surroundings and touched the beaker, it would feel _______. 

• Warm
• Cold

Multiple Choice

In an endothermic reaction the system is releasing energy.

• True
• False

Multiple Choice

If a chemical reaction is EXOTHERMIC, the temperature would....

• Stay the same
• Increase
• Decrease

Multiple Choice

In an exothermic reaction, heat is ...

• taken in
• given out

Multiple Choice

In an endothermic reaction, heat is ...

• taken in

• given out

Multiple Choice

Which letter represents the reactants?

• A

• B

• C

• D

• E

Multiple Choice

Which letter represents the products?

• A

• B

• C

• D

• E

Multiple Choice

Which letter represents the transition state?

• A

• B

• C

• D

• E

Multiple Choice

Which letter shows the heat change?

• A

• B

• C

• D

• E

Multiple Choice

What type of reaction is shown in the reaction pathway?

• endothermic reaction
• exothermic reaction

Multiple Choice

Are the products or reactants of this reaction storing more energy in their chemical bonds?

• Both storing the same

• No way to tell

• Products

• Reactants

Multiple Choice

What is the Heat of Reaction  $\Delta H$  for this reaction?

• -200 KJ

• 200 KJ

• 400 KJ

• -300 KJ

Multiple Choice

Which letter shows the activation energy?

• A

• B

• C

• D

• E

Multiple Choice

What does 'A' represent on the energy profile diagram attached?

• Products

• Energy lost

• Activation Energy

• Overall change in energy

Multiple Choice

For which reaction is the activation energy higher?

• With the catalyst

• Without the catalyst

Multiple Choice

Consider the following energy profile diagram for a reaction represented by the equation X+Y→Z
Which one of the following provides the correct values of the activation energy (in kJ mol^-1) and the ΔH (in kJ mol^-1) for the reaction

• Activation Energy = +75; ΔH = +100 
• Activation Energy = +100; ΔH = +175
• Activation Energy = +175; ΔH = +100
• Activation Energy = +200; ΔH = -125