AP Chem unit 13 presentation
... It is important to realize that although changes to the reaction may alter the equilibrium positions, they do not alter the equilibrium constant. ...
... It is important to realize that although changes to the reaction may alter the equilibrium positions, they do not alter the equilibrium constant. ...
ENTHALPY CHANGE DH
... The size of the measured enthalpy change for a given quantity of reactant(s) in a given reaction will depend also on the temperature and pressure at which it is measured. Therefore, it is usual to quote enthalpy changes which have been measured under agreed standard conditions. Standard Pressure: Th ...
... The size of the measured enthalpy change for a given quantity of reactant(s) in a given reaction will depend also on the temperature and pressure at which it is measured. Therefore, it is usual to quote enthalpy changes which have been measured under agreed standard conditions. Standard Pressure: Th ...
The Control of Moisture of Rocks by Methods of
... 1. Its dielectric characteristics should be well enough described on the basis of one from known formulae for mixture. 2. The material should be well known and abundant. 3. Its mechanical properties should be similar to the same of rock concentrate. Quartz sand has been chosen as such a material wit ...
... 1. Its dielectric characteristics should be well enough described on the basis of one from known formulae for mixture. 2. The material should be well known and abundant. 3. Its mechanical properties should be similar to the same of rock concentrate. Quartz sand has been chosen as such a material wit ...
Solubility Solubility is defined as the amount of solute that will
... final time - initial time min This will give us a average rate because we will find that often the rate will change as the reaction proceeds. Also you might observe that the negative sign in front of the equation makes the value positive, as required by the definitition of rate. The rate is the expe ...
... final time - initial time min This will give us a average rate because we will find that often the rate will change as the reaction proceeds. Also you might observe that the negative sign in front of the equation makes the value positive, as required by the definitition of rate. The rate is the expe ...
thermodynamics
... case of compression [Fig. 6.5(c)]. In an expansion process under similar conditions, the external pressure is always less than the pressure of the system i.e., pex = (pin– dp). In general case we can write, pex = (pin + dp). Such processes are called reversible processes. A process or change is said ...
... case of compression [Fig. 6.5(c)]. In an expansion process under similar conditions, the external pressure is always less than the pressure of the system i.e., pex = (pin– dp). In general case we can write, pex = (pin + dp). Such processes are called reversible processes. A process or change is said ...
Physical and Chemical equilibrium
... (ii)At equilibrium, concentration of all reactants and products becomes constant (iii)Equilibrium is dynamic in nature i.e. reaction seems to be static because no change in concentration of reactants or product, but actually reaction takes place in both the directions with same speed (iv)Catalyst do ...
... (ii)At equilibrium, concentration of all reactants and products becomes constant (iii)Equilibrium is dynamic in nature i.e. reaction seems to be static because no change in concentration of reactants or product, but actually reaction takes place in both the directions with same speed (iv)Catalyst do ...
Unit 5: Chemical Kinetics and Equilibrium
... 3. Particle Size: - the Smaller the Particle Size (the Larger the Surface Area exposed), the Faster the Reaction Rate. Example 1: Grain sugar dissolves faster than equal mass of sugar cubes because of smaller particle size and therefore increased surface area of the grain sugar. 4. Concentration: - ...
... 3. Particle Size: - the Smaller the Particle Size (the Larger the Surface Area exposed), the Faster the Reaction Rate. Example 1: Grain sugar dissolves faster than equal mass of sugar cubes because of smaller particle size and therefore increased surface area of the grain sugar. 4. Concentration: - ...
EQUILIBRIUM - SCH4U1-CCVI
... be made about the equilibrium concentrations in other solutions. To prepare a solution with a known concentration of the coloured complex, a dilute solution of thiocyanate ion is reacted with a concentrated solution of iron (III) ion. It may be assumed that the large excess of iron (III) ion causes ...
... be made about the equilibrium concentrations in other solutions. To prepare a solution with a known concentration of the coloured complex, a dilute solution of thiocyanate ion is reacted with a concentrated solution of iron (III) ion. It may be assumed that the large excess of iron (III) ion causes ...
Chapter 16
... reaches a maximum, the reaction stops (Fig. 16–2). Therefore, entropy is a very useful property in the analysis of reacting adiabatic systems. When a reacting system involves heat transfer, the increase of entropy principle relation (Eq. 16–1) becomes impractical to use, however, since it requires a ...
... reaches a maximum, the reaction stops (Fig. 16–2). Therefore, entropy is a very useful property in the analysis of reacting adiabatic systems. When a reacting system involves heat transfer, the increase of entropy principle relation (Eq. 16–1) becomes impractical to use, however, since it requires a ...
Supporting Information - Royal Society of Chemistry
... required to achieve about 50% inhibition of the enzyme (2.5 M) in the presence of 75 M substrate (p-nitrophenyl acetate) were first determined (25 mM HEPES buffer, pH = 7.0; absorbance followed at 450 nm). The kinetic data were analyzed via the double reciprocal plots of the initial rates of the e ...
... required to achieve about 50% inhibition of the enzyme (2.5 M) in the presence of 75 M substrate (p-nitrophenyl acetate) were first determined (25 mM HEPES buffer, pH = 7.0; absorbance followed at 450 nm). The kinetic data were analyzed via the double reciprocal plots of the initial rates of the e ...
An Analogy for an Equilibrium Reaction
... The addition of an inert gas or gases to a constant volume system at equilibrium does not change the position of the equilibrium. ...
... The addition of an inert gas or gases to a constant volume system at equilibrium does not change the position of the equilibrium. ...
The Equilibrium Constant K
... a) The system will shift away from the added gaseous component. If a component is removed, the opposite effect occurs. b) Addition of inert gas does not affect the equilibrium position. The addition of inert gas increases the total pressure, but has no effect on the concentration or the partial pres ...
... a) The system will shift away from the added gaseous component. If a component is removed, the opposite effect occurs. b) Addition of inert gas does not affect the equilibrium position. The addition of inert gas increases the total pressure, but has no effect on the concentration or the partial pres ...
At equilibrium
... Le Chatelier’s Principle The Tendency Towards Equilibrium • Any system which is not at equilibrium will tend to change spontaneously toward a state of equilibrium (i.e. without a need for us to adjust external variables such as temperature and pressure). • It follows that if a chemical system at eq ...
... Le Chatelier’s Principle The Tendency Towards Equilibrium • Any system which is not at equilibrium will tend to change spontaneously toward a state of equilibrium (i.e. without a need for us to adjust external variables such as temperature and pressure). • It follows that if a chemical system at eq ...
5.1 questions - DrBravoChemistry
... Write an expression showing the relationship between free-energy change, ∆G, enthalpy change, ∆H, and entropy change, ∆S. ...
... Write an expression showing the relationship between free-energy change, ∆G, enthalpy change, ∆H, and entropy change, ∆S. ...
The Second Law - chem.uwec.edu
... heater attached to it, and water can be decomposed by the passage of an electric current. However, in each case we need to act in some way on the system to bring about the non-spontaneous change. There must be some feature of the world that accounts for the distinction between the two types of chang ...
... heater attached to it, and water can be decomposed by the passage of an electric current. However, in each case we need to act in some way on the system to bring about the non-spontaneous change. There must be some feature of the world that accounts for the distinction between the two types of chang ...
the chemical and physical properties of condensed
... Phase transition Phase transitions are classified in thermodynamic treatments as continuous and discontinuous29. In the former case, the transitions may occur through an intermediate hybrid crystal. In the latter case, the mother crystal is decomposed into daughter crystals which may or may not be s ...
... Phase transition Phase transitions are classified in thermodynamic treatments as continuous and discontinuous29. In the former case, the transitions may occur through an intermediate hybrid crystal. In the latter case, the mother crystal is decomposed into daughter crystals which may or may not be s ...
File
... - Observations of some chemical systems in a closed system (where no matter is able to escape to the surroundings) will appear as though ___ change is occurring, i.e. an _______________ has been achieved - This does not mean that there is ___ activity at the molecular level, in fact chemical systems ...
... - Observations of some chemical systems in a closed system (where no matter is able to escape to the surroundings) will appear as though ___ change is occurring, i.e. an _______________ has been achieved - This does not mean that there is ___ activity at the molecular level, in fact chemical systems ...
Chemical Equilibria - Beck-Shop
... (Rb ). When this happens, the concentration of every reactant and product remains constant, and the system is in a state of balance, known as equilibrium. More specifically, the system is said to be in dynamic equilibrium. As the rates of these reactions are equal, it may seem that the reactions have ...
... (Rb ). When this happens, the concentration of every reactant and product remains constant, and the system is in a state of balance, known as equilibrium. More specifically, the system is said to be in dynamic equilibrium. As the rates of these reactions are equal, it may seem that the reactions have ...
Chapter 14 - Moore Public Schools
... • When the equilibrium constant is very small, the position of equilibrium favors the reactants. • For relatively large initial concentrations of reactants, the reactant concentration will not change significantly when it reaches equilibrium. – assuming the reaction is proceeding forward – The [X]eq ...
... • When the equilibrium constant is very small, the position of equilibrium favors the reactants. • For relatively large initial concentrations of reactants, the reactant concentration will not change significantly when it reaches equilibrium. – assuming the reaction is proceeding forward – The [X]eq ...
K eq
... 1. Each student wads up two paper wads. 2. You must start and stop as the timekeeper says. 3. Throw only one paper wad at a time. 4. If a paper wad lands next to you, you must throw it back. ...
... 1. Each student wads up two paper wads. 2. You must start and stop as the timekeeper says. 3. Throw only one paper wad at a time. 4. If a paper wad lands next to you, you must throw it back. ...
24. The following reaction is at equilibrium
... (A) A reaction will proceed to make the value of Q approach that of K. (B) If Q = K there is no change. (C) If Q > K, the reaction goes to the left. (D) The system will never come to equilibrium. (E) If Q < K for a particular reaction, the final equilibrium mixture will have more reactants than the ...
... (A) A reaction will proceed to make the value of Q approach that of K. (B) If Q = K there is no change. (C) If Q > K, the reaction goes to the left. (D) The system will never come to equilibrium. (E) If Q < K for a particular reaction, the final equilibrium mixture will have more reactants than the ...
CHAPTER 9
... (1) Replacement reactions and addition reactions are two terms which describe the same type of reaction. (2) Orientation relative to one another, at the moment of collision, is always a factor in determining whether a collision is effective. (3) An increase in temperature will always cause an endoth ...
... (1) Replacement reactions and addition reactions are two terms which describe the same type of reaction. (2) Orientation relative to one another, at the moment of collision, is always a factor in determining whether a collision is effective. (3) An increase in temperature will always cause an endoth ...
A Review of using Spray Pyrolysis through Sol-gel
... remarkably to optimize their capacity and cycle life performance. This review study focused on the use of some techniques to synthesize the common cathode materials (LiCoO2, LiMn2O4,LiFePO4). The most common and simplest synthesis method was the mixing of powders in their solid-state form and heatin ...
... remarkably to optimize their capacity and cycle life performance. This review study focused on the use of some techniques to synthesize the common cathode materials (LiCoO2, LiMn2O4,LiFePO4). The most common and simplest synthesis method was the mixing of powders in their solid-state form and heatin ...
3 CO 2 (g) + 4 H 2 O(l)
... Enthalpy is not stored as heat. Rather enthalpy is a measure of the capacity of the system to supply energy as heat when a certain change occurs. The enthalpy of a substance will depend on its physical state (solid, liquid or vapour) and its temperature (it will also depend upon the pressure but thi ...
... Enthalpy is not stored as heat. Rather enthalpy is a measure of the capacity of the system to supply energy as heat when a certain change occurs. The enthalpy of a substance will depend on its physical state (solid, liquid or vapour) and its temperature (it will also depend upon the pressure but thi ...
