Podcast
Questions and Answers
What is the state in which the rate of the forward reaction is the same as the rate of the reverse reaction?
What is the state in which the rate of the forward reaction is the same as the rate of the reverse reaction?
Which type of equilibrium exists when a given system is not changing in motion?
Which type of equilibrium exists when a given system is not changing in motion?
In the reaction aA + bB ⇌ cC + dD, what do the lower case letters represent?
In the reaction aA + bB ⇌ cC + dD, what do the lower case letters represent?
What is the expression for the equilibrium constant Kc?
What is the expression for the equilibrium constant Kc?
Signup and view all the answers
What is the unit of the equilibrium constant Kc?
What is the unit of the equilibrium constant Kc?
Signup and view all the answers
What is the relationship between the forward and reverse reaction rates in dynamic equilibrium?
What is the relationship between the forward and reverse reaction rates in dynamic equilibrium?
Signup and view all the answers
What is the expression for the equilibrium constant Kp?
What is the expression for the equilibrium constant Kp?
Signup and view all the answers
Which of the following is an example of dynamic equilibrium?
Which of the following is an example of dynamic equilibrium?
Signup and view all the answers
What is the purpose of the equilibrium constant expression?
What is the purpose of the equilibrium constant expression?
Signup and view all the answers
Study Notes
Chemical Equilibrium
- Equilibrium state occurs when the rate of the forward reaction matches the rate of the reverse reaction.
- Two classifications exist for equilibrium states:
- Static Equilibrium: No motion change occurs; balanced forces act on objects.
- Dynamic Equilibrium: Ongoing processes ensure no overall change, creating a balance among states.
Examples of Dynamic Equilibrium
- A girl running up a downward-moving escalator.
- Rate of dissolving equals the rate of recrystallization.
- Traffic flow during rush hour maintains constant congestion levels.
Equilibrium-Constant Expression
- The general form is represented as:
aA + bB ⇌ cC + dD- Lowercase letters symbolize stoichiometric coefficients.
- The equilibrium condition is represented by:
Kc = [C]^c [D]^d / [A]^a [B]^b- Kc denotes the equilibrium constant, indicating concentrations in Molarity.
Concept of Equilibrium
-
Forward Reaction: A → B
- Rate is calculated as Rate = kf [A]
-
Reverse Reaction: B → A
- Rate is calculated as Rate = Kr [B]
- The equation for equilibrium expression:
Kf [A] = Kr [B]- Thus, [B]/[A] = Kf / Kr.
Chemical Equilibrium Expression Examples
- For the reaction N2 + 3H2 ⇌ 2NH3.
- For the reaction N2O4 ⇌ 2NO2 with equilibrium concentrations given as NO2 = 0.0172M and N2O4 = 0.00140M.
Kc Calculation Example
- For the reaction CO + Cl2 ⇌ CoCl2 with initial concentrations [CO] = 0.0102M and [Cl2] = 0.00609M and equilibrium concentration CoCl2 = 0.00301M.
- Calculate Kc using the established expression.
Pressure Equilibrium Constant (Kp)
- Kp is defined for reactions involving gases, expressed as:
Kp = [PC]^c [PD]^d / [PA]^a [PB]^b - Kp relates the partial pressures of reacting gases.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Description
Test your understanding of chemical equilibrium, including static and dynamic equilibrium states, and their examples in real-life scenarios.
