Chemical Equilibrium and Reaction Dynamics

The video tutorial covers questions 6-10 related to an exothermic reaction, focusing on equilibrium expressions, factors affecting reaction speed, and the impact of temperature on equilibrium constants and delta G. It explains how to determine product or reactant favorability based on Kc values and discusses the effects of pressure and temperature changes on reaction shifts and spontaneity.

What is the correct form of the equilibrium expression constant for a reaction involving only gases?

• Reactants over products, without coefficients

• Reactants over products, with coefficients as exponents

• Products over reactants, with coefficients as exponents

• Products over reactants, without coefficients

Which factor would cause the reverse reaction to speed up by shifting the equilibrium to the left?

• Removing some SO2

• Lowering the temperature

• Raising the pressure

• Adding more SO3

What is the impact of adding a catalyst on the speed of a reaction?

• Has no effect on the reaction speed

• Speeds up both forward and reverse reactions

• Speeds up only the reverse reaction

• Speeds up only the forward reaction

If the equilibrium constant Kc is greater than 1, what does it indicate about the reaction?

• The reaction is at equilibrium

• The reaction is not spontaneous

• Products are favored

• Reactants are favored

In the context of equilibrium, what does a Kc value of 8.1 suggest?

• Reactants are strongly favored

• Reactants are weakly favored

• Products are weakly favored

• Products are strongly favored

How does raising the temperature affect the equilibrium constant of an exothermic reaction?

• Kc becomes zero

• Kc increases

• Kc remains the same

• Kc decreases

Which of the following is true about the equilibrium constant when chemical quantities are changed?

• It remains unchanged

• It decreases

• It increases

• It becomes zero

What is the effect of lowering the temperature on an exothermic reaction's equilibrium position?

• No shift

• Shifts to the left

• Becomes zero

• Shifts to the right

What happens to delta G when the temperature of an exothermic reaction is increased?

• Delta G becomes less negative

• Delta G becomes more negative

• Delta G becomes zero

• Delta G remains unchanged

How does the spontaneity of a reaction relate to delta G?

• Negative delta G indicates non-spontaneity

• Delta G has no relation to spontaneity

• Positive delta G indicates spontaneity

• Negative delta G indicates spontaneity