2co(g) + o₂(g) → 2co₂(g)\nif the reaction occurs in a closed chamber, ____________ will result in a decrease…

2co(g) + o₂(g) → 2co₂(g)\nif the reaction occurs in a closed chamber, ____________ will result in a decrease in the reaction rate.\na increasing the temperature\nb adding more co to the container\nc increasing the size of the container\nd removing the co₂ as it is formed

2co(g) + o₂(g) → 2co₂(g)\nif the reaction occurs in a closed chamber, ____________ will result in a decrease in the reaction rate.\na increasing the temperature\nb adding more co to the container\nc increasing the size of the container\nd removing the co₂ as it is formed

Answer

Explanation:

Step1: Recall reaction - rate factors

Reaction rate depends on concentration, temperature, etc. Higher concentration and temperature usually increase reaction rate.

Step2: Analyze option A

Increasing temperature provides more kinetic energy to reactant molecules, increasing collision frequency and reaction rate. So A is incorrect.

Step3: Analyze option B

Adding more CO (a reactant) increases its concentration. Higher reactant concentration leads to more collisions and higher reaction rate. So B is incorrect.

Step4: Analyze option C

Increasing the size of the container decreases the pressure (for gas - phase reactions like this one). Decreased pressure means lower concentration of reactants (fewer molecules per unit volume), resulting in fewer collisions and a lower reaction rate. So C is correct.

Step5: Analyze option D

Removing CO₂ as it is formed shifts the equilibrium to the right according to Le - Chatelier's principle. This can potentially increase the forward reaction rate as the system tries to re - establish equilibrium. So D is incorrect.

Answer:

C. increasing the size of the container