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chem 102 class notes - Louisiana Tech University
chem 102 class notes - Louisiana Tech University

... long period of time, the contents of the reaction vessel do not become colorless. Instead, the intensity of the brown color eventually becomes constant, which means that the concentration of NO2 is no longer changing. Making the container colder makes equilibrium to shift to left and warming shift ...
text page 117 2.4 Entropy Change versus
text page 117 2.4 Entropy Change versus

... information for you to reliably determine whether entropy increases or decreases during the reaction but: Entropy usually decreases when gas particles combine into fewer particles. ...
Chemical Equilibrium - 2012 Book Archive
Chemical Equilibrium - 2012 Book Archive

... Consider the following reaction occurring in a closed container (so that no material can go in or out): H2 + I2 → 2HI This is simply the reaction between elemental hydrogen and elemental iodine to make hydrogen iodide. The way the equation is written, we are led to believe that the reaction goes to ...
16 Chemical Equilibrium Chapter Outline Rates of Reaction
16 Chemical Equilibrium Chapter Outline Rates of Reaction

Chemical Equilibrium
Chemical Equilibrium

... Write ksp expression for each of the following: AgI(s)  Ag1+ (aq) + I1- (aq) Ag2S(s)  2Ag1+ (aq) + S2- (aq) PbI2(s)  Pb2+ (aq) + 2I1- (aq) MgCO3(s)  Mg2+(aq) + CO32-(aq) Ca3(PO4)2(s)  3Ca2+(aq) + 2PO43- (aq) ...
Document
Document

... Copyright © by Holt, Rinehart and Winston. All rights reserved. ...
Document
Document

... the species in a reaction and asked to determine in which direction the reaction must proceed to achieve equilibrium. Plan We can determine the starting concentration of each species in the reaction mixture. We can then substitute the starting concentrations into the equilibrium-constant expression ...
Chemical Equilibrium
Chemical Equilibrium

... the reverse reaction continue to occur. They both occur at the same rate, so any overall change by one reaction is cancelled by the reverse reaction. We say that chemical equilibrium is dynamic, rather than static. Also, because both reactions are occurring simultaneously, the equilibrium can be wri ...
Unit 3: 1 Equilibrium and the Constant, K
Unit 3: 1 Equilibrium and the Constant, K

... Learning objective 6.1 The student is able to, given a set of experimental observations regarding physical, chemical, biological, or environmental processes that are reversible, construct an explanation that connects the observations to the reversibility of the underlying chemical reactions or proc ...
Equilibrium
Equilibrium

... It may be tempting to think that once equilibrium has been reached, the reaction stops. However, chemical equilibrium is a dynamic process. The forward and reverse reactions continue to occur even after equilibrium has been reached, but, because the rates of the two reactions are equal, there is no ...
Equilibrium Reversible Reactions
Equilibrium Reversible Reactions

... For example, in a class of 20 students, 10 students could represent sodium ions and 10 students could represent chloride ions. Have 4 sodium ions and 4 chloride ions link arms on the left side of the room to represent sodium chloride particles. Have the remaining 12 students stand on the right side ...
Chapter 15: Chemical Equilibrium
Chapter 15: Chemical Equilibrium

... of the reaction products is physically separated from a reaction mixture as a gas (the reaction of a metal carbonate with acid, for example, Figure 15.X), a single reaction arrow is used. The Equilibrium State In Chapter 12, we described the nature of a dynamic equilibrium between a liquid and its v ...
Chapter 15
Chapter 15

... of the reaction products is physically separated from a reaction mixture as a gas (the reaction of a metal carbonate with acid, for example, Figure 15.X), a single reaction arrow is used. The Equilibrium State In Chapter 12, we described the nature of a dynamic equilibrium between a liquid and its v ...
Chapter 16 Controlling the yield of reactions
Chapter 16 Controlling the yield of reactions

... The volume of the container was increased at constant temperature and a new equilbrium was established. Predict how each of the following quantities would change at the new equilibrium compared with the initial equilibrium: a concentration of NO2 b mass of NO2 A12. ...
An Analogy for an Equilibrium Reaction
An Analogy for an Equilibrium Reaction

Ch16 - WordPress.com
Ch16 - WordPress.com

... The volume of the container was increased at constant temperature and a new equilbrium was established. Predict how each of the following quantities would change at the new equilibrium compared with the initial equilibrium: a concentration of NO2 b mass of NO2 A12. An increase in volume will cause a ...
File - IB CHEM NINJA
File - IB CHEM NINJA

... consequence, macroscopic properties of the system (that is those that can be observed or measured, such as its colour, density, pH) are constant, even though on a molecular scale there is continual interconversion of reactants and products. The concentrations of the species at equilibrium will refle ...
Ch16
Ch16

... The volume of the container was increased at constant temperature and a new equilbrium was established. Predict how each of the following quantities would change at the new equilibrium compared with the initial equilibrium: a concentration of NO2 b mass of NO2 A12. An increase in volume will cause a ...
Analytical Chemistry
Analytical Chemistry

... Dr. Manal A. Tooma ...
Equilibrium Expression (Keq)
Equilibrium Expression (Keq)

ENTROPY
ENTROPY

... the extreme consideration of a single distinguishable quantum state (identified by its quantum numbers). The distribution is characterised by the amounts of extensive magnitudes belonging to each subsystem. Let P={p1,p2,...pn}, with pi≥0 and Σpi=1, be a probability distribution function, such that p ...
Slide 1
Slide 1

... proposed the law of chemical equilibrium, which states that at a given temperature, a chemical system may reach a state in which a particular ratio of reactant and product concentrations has a constant value. ...
Physical and Chemical equilibrium
Physical and Chemical equilibrium

... concentration of reactants or product, but actually reaction takes place in both the directions with same speed (iv)Catalyst does not affect the equilibrium, it only fastens the chemical reaction to attain the state of equilibrium (v) Chemical equilibrium can be attended in either direction (vi) Cha ...
Physcal Chemistry ERT 108 semester II 2010/2011
Physcal Chemistry ERT 108 semester II 2010/2011

... A system may be separated from its surroundings by various kinds of wall: ...
(K c ) [A] - Knockhardy
(K c ) [A] - Knockhardy

... the AQA and OCR specifications but is suitable for other examination boards. Individual students may use the material at home for revision purposes or it may be used for classroom teaching if an interactive white board is available. Accompanying notes on this, and the full range of AS and A2 topics, ...
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Thermodynamic equilibrium

Thermodynamic equilibrium is an axiomatic concept of classical thermodynamics. It is an internal state of a single thermodynamic system, or a relation between several thermodynamic systems connected by permeable walls. In thermodynamic equilibrium there are no net macroscopic flows of matter or of energy, either within a system or between systems. In a system in its own state of internal thermodynamic equilibrium, no macroscopic change occurs. Systems in mutual thermodynamic equilibrium are simultaneously in mutual thermal, mechanical, chemical, and radiative equilibria. Systems can be in one kind of mutual equilibrium, though not in others. In thermodynamic equilibrium, all kinds of equilibrium hold at once and indefinitely, until disturbed by a thermodynamic operation. In a macroscopic equilibrium, almost or perfectly, exactly balanced microscopic exchanges occur; this is part of the notion of macroscopic equilibrium.An isolated thermodynamic system in its own state of internal thermodynamic equilibrium has a uniform temperature. If its surroundings impose some unchanging long range force field on it, it may consist of one phase or may exhibit several spatially unchanging internal phases. If its surroundings impose no long range force field on it, then either (1) it is spatially homogeneous, with all intensive properties being uniform; or (2) it has several internal phases, which may exhibit indefinitely persistent continuous spontaneous microscopic or mesoscopic fluctuations.In non-equilibrium systems, by contrast, there are net flows of matter or energy. If such changes can be triggered to occur in a system in which they are not already occurring, it is said to be in a metastable equilibrium.It is an axiom of thermodynamics that when a body of material starts from a non-equilibrium state of non-homogeneity or chemical non-equilibrium, and, by a thermodynamic operation, is then isolated, it spontaneously evolves towards its own internal state of thermodynamic equilibrium. This axiom is presupposed by the second law of thermodynamics, which restricts what can happen when a system, having reached thermodynamic equilibrium, with a well defined entropy, is subject to a thermodynamic operation.
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