Temperature Effects on Equilibrium

The video tutorial explains how temperature affects the equilibrium position of chemical reactions, focusing on the role of enthalpy change. It distinguishes between exothermic and endothermic reactions, where exothermic reactions release heat and endothermic reactions absorb heat. The tutorial provides a step-by-step approach to solving equilibrium questions, emphasizing the importance of determining the sign of the enthalpy change. A practical example is used to illustrate how a decrease in temperature affects the equilibrium, leading to a shift in favor of the reactants when the reaction is endothermic.

What is the primary factor that determines the effect of temperature on the position of equilibrium?

• The value of enthalpy change

• The pressure of the system

• The concentration of reactants

• The volume of the container

What does a negative enthalpy change indicate about a reaction?

• The reaction is exothermic

• The reaction absorbs light

• The reaction is endothermic

• The reaction is at equilibrium

In an endothermic reaction, what is the sign of the enthalpy change?

• Zero

• Positive

• Negative

• Undefined

What should you first determine when solving a problem about temperature effects on equilibrium?

• The volume of the system

• The sign of the enthalpy change

• The initial temperature

• The final pressure

If a reaction is endothermic, what assumption can be made about the product's state?

• The product is in a hot state

• The product is in a cold state

• The product is gaseous

• The product is solid

What happens to the equilibrium position when the temperature of an endothermic reaction is decreased?

• Equilibrium shifts to the right

• Equilibrium shifts to the left

• Equilibrium remains unchanged

• Equilibrium becomes unstable

In the context of the video, what does decreasing the temperature do to a cold product?

• Has no effect

• Favors the reactant

• Favors the product

• Increases the reaction rate

What is the effect of decreasing temperature on the reactant side in an endothermic reaction?

• It causes the reaction to stop

• It remains the same

• It becomes more favorable

• It becomes less favorable

What is the general effect of temperature decrease on the equilibrium of an endothermic reaction?

• Decreases the rate of reaction

• Shifts equilibrium to the left

• Shifts equilibrium to the right

• Increases the rate of reaction

What is the overall conclusion about the effect of temperature decrease on equilibrium in the video?

• It favors the backward reaction

• It favors the forward reaction

• It destabilizes the system

• It has no effect