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Equilibrium

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AP Chemistry

Definition

Equilibrium refers to the state in which both reactants and products are present in concentrations which have no further tendency to change over time. It's when forward and reverse reactions occur at equal rates so there's no net change observed.

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"Equilibrium" also found in:

Subjects (69)

AP Macroeconomics
AP Microeconomics
AP Physics 1
AP Physics C: Mechanics
Abstract Linear Algebra I
Aerodynamics
Anatomy and Physiology I
Anatomy and Physiology II
Biology for Non-STEM Majors
Bridge Engineering
Calculus II
Calculus III
Cell Biology
Chemical Basis of Bioengineering I
Chemical Process Balances
College Physics I – Introduction
College Physics II – Mechanics, Sound, Oscillations, and Waves
College Physics III – Thermodynamics, Electricity, and Magnetism
Computational Chemistry
Earth Surface Processes
Earth Systems Science
Electrochemistry
Engineering Mechanics – Dynamics
Engineering Probability
Fluid Mechanics
Game Theory
General Biology I
General Chemistry II
Greek Philosophy
Heat and Mass Transport
History of Economic Ideas
Honors Biology
Honors Economics
Honors Physics
Intermediate Macroeconomic Theory
Intermediate Microeconomic Theory
International Economics
International Public Relations
Intro to Business
Intro to Chemistry
Intro to Civil Engineering
Intro to Dynamic Systems
Intro to Engineering
Intro to Flight
Intro to Mathematical Economics
Intro to Mechanics
Linear Algebra and Differential Equations
Mathematical Modeling
Mechanical Engineering Design
Molecular Biology
Motor Learning and Control
News Photography
Organic Chemistry
Physical Chemistry I
Plant Physiology
Power System Stability and Control
Principles of Economics
Principles of Finance
Principles of Macroeconomics
Principles of Microeconomics
Principles of Physics I
Soft Robotics
Sports Biomechanics
Statics and Strength of Materials
Statistical Mechanics
Structural Analysis
Thermodynamics
Thermodynamics I
Thermodynamics of Fluids

Practice Questions (20+)

A reaction between nitrogen and hydrogen to create ammonia is found to be exothermic at equilibrium. The reaction is then placed into an oven. Which of the following statements is true?
A reaction vessel contains some amount of calcium carbonate and calcium oxide, and the system is found to be at equilibrium. If carbon dioxide is injected into the vessel, which of the following is true?
Equilibrium is established in a reaction vessel, of which argon (Ar) is not a reactant nor product. What happens when argon (Ar) is added to a reaction vessel AT CONSTANT VOLUME?
Equilibrium is established in a reaction vessel, of which argon (Ar) is not a reactant nor product. What happens when argon (Ar) is added to a reaction vessel AT CONSTANT PRESSURE?
Consider the equation N₂ (g)+ 3H₂ (g) ⇌ 2NH₃ (g). The ΔH° is -92.6 kJ/mol. Which of the following statements about concentration after the adjusted equilibrium is NOT true?
Consider the equation 2SO₃ ⇌ O₂ + 2SO₂. Given a K value of 8 and concentration of 2M for all substances, which way must the reaction move to reach equilibrium?
What are the rates of forward and reverse reactions at equilibrium?
A + 3B ⇌ 2C + 2D is at equilibrium. The initial concentration of A is 1.2 M, and the initial concentration of B is 1.5 M. The concentration of C at equilibrium is 0.6 M. What is the equilibrium constant, K?
At equilibrium, which of the following is true?
What is the thermodynamic definition of equilibrium in AP Chemistry?
Which of the following statements is true about the relationship between free energy and equilibrium?
The cell potential is a driving force toward equilibrium; the farther the reaction is from equilibrium, the ____ the magnitude of the cell potential.
In general terms, equilibrium is defined as the point at which the rate of the reaction is ________ is similar to the reaction __________ and the concentrations _____________.
Wen at equilibrium, the forward and backward rate _______________________.
Let's clear up a common misconception! Is equilibrium a dynamic process?
A reaction vessel is filled such that the concentration of hydrogen gas, chlorine gas, and hydrogen chloride each have a partial pressure of 1.0 atm. What happens to the total pressure of the reaction vessel as the reaction proceeds to equilibrium?
Consider the reaction N2(g) + O2(g) ⇌ 2NO(g). If the reaction is at equilibrium and the pressure is increased, what is the effect on the direction of the reaction?
Consider the reaction 2H2(g) + S2(g) ⇌ 2H2S(g). If the concentration of H2S is increased, what is the effect on the direction of the reaction at equilibrium?
What is the value of Kp given that at equilibrium, the partial pressure of oxygen gas is 2.0 atm, the partial pressure of a free oxygen atom is 1.0 atm, and the partial pressure of ozone is 4.0 atm at 298 K?
A reaction is shown to occur and has reached equilibrium, with all molecules being in a gaseous state. A+2B+C⇌3D is the reaction and it happens at 298 K in a closed container with a defined volume. The partial pressure of the molecules is shown below. What is the equilibrium expression Kp for this reaction? PA = 0.50 atm PB = 0.02 atm PC = 1.50 atm PD =0.05 atm

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Equilibrium

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AP Chemistry

Definition

"Equilibrium" also found in:

Subjects (69)

Practice Questions (20+)

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AP® and SAT® are trademarks registered by the College Board, which is not affiliated with, and does not endorse this website.

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Equilibrium

from class:

AP Chemistry

Definition

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"Equilibrium" also found in:

Subjects (69)

Practice Questions (20+)

© 2024 Fiveable Inc. All rights reserved.

AP® and SAT® are trademarks registered by the College Board, which is not affiliated with, and does not endorse this website.

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