Let's warm up our thinking with a generic reaction:

Question

Reactant 1 + Reactant 2 ⇔ Product A + Heat

Using the sample reaction, determine the shift that will result with each disturbance.



(5 points)
Favors Forward Reaction (Shift right) Favors Reverse Reaction (Shifts left)
Removal of Reactant 2

Addition of heat

Removal of heat

Addition of Reactant 1

Removal of Product A

Question 2
The forward reaction seen here can be considered:

Reactant 1 + Reactant 2 ⇔ Product A + Heat

(1 point)
Responses

Endothermic
Endothermic

Exothermic
Exothermic

Answer 1

For the generic reaction provided:

Reactant 1 + Reactant 2 ⇔ Product A + Heat

let's analyze the shifts in response to various disturbances.

Responses to Disturbances:

Favors Forward Reaction (Shift right)
Favors Reverse Reaction (Shifts left)

1. Removal of Reactant 2

   • Shift left (Favors Reverse Reaction): When a reactant is removed, the system will shift to the left to replace the removed reactant.

2. Addition of heat

   • Shift left (Favors Reverse Reaction): The reaction can be viewed as exothermic since heat is released as a product. Adding heat shifts the equilibrium to the left to absorb the excess heat.

3. Removal of heat

   • Shift right (Favors Forward Reaction): By removing heat, the system will shift to the right to produce more heat, favoring the production of Product A.

4. Addition of Reactant 1

   • Shift right (Favors Forward Reaction): Adding a reactant will drive the reaction to the right to use up the excess reactant and form more products.

5. Removal of Product A

   • Shift right (Favors Forward Reaction): Removing a product will shift the equilibrium to the right to produce more of Product A.

Question 2

For the question identifying whether the forward reaction is endothermic or exothermic:

The forward reaction is Exothermic.

This is because heat is produced (released) as a product of the reaction. Thus, the correct response is "Exothermic."