2 NO + 02 2 NO2 + 114 kJ/mol What happens to the [NO2] when heat is added ? What happens to the [NO2] when heat is removed ? The reaction would respond to an increase in pressure by trying to reduce this stress. With gases, the pressure is related to moles by PV = nRT. Thus, reducing the moles at equilibrium will reduce the pressure. Which side of the reaction has the most moles, reactants or products ? What happens to the [NO2] when the pressure is increased ? What happens to the [NO2] when the pressure is decreased ? A. increases B. decreases C. no change D. reactants E. products

2 NO + 02 2 NO2 + 114 kJ/mol What happens to the [NO2] when heat is added ? What happens to the [NO2] when heat is removed ? The reaction would respond to an increase in pressure by trying to reduce this stress. With gases, the pressure is related to moles by PV = nRT. Thus, reducing the moles at equilibrium will reduce the pressure. Which side of the reaction has the most moles, reactants or products ? What happens to the [NO2] when the pressure is increased ? What happens to the [NO2] when the pressure is decreased ? A. increases B. decreases C. no change D. reactants E. products

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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i See Periodic Table See Hin Increasing the concentration of a reactant shifts the position of chemical equilibrium towards formation of more products. What effect does adding a reactant have on the rates of the forward and reverse reactions? Choose one: O There is no effect on the forward and reverse reactions. For an equilibrium reaction, the forward and reverse rates are always equal. O Both the forward and reverse reactions speed up by the same amount. O The forward reaction speeds up immediately. As more product is made, the reverse reaction starts to speed up as the forward reaction starts to slow down until they are equal. O The forward reaction slows down initially. As the reaction proceeds, the reverse reaction slows down to meet the new forward reaction. O The forward reaction speeds up. Eventually, production of the product speeds up the reverse reaction rate to match the new forward rate. O It is impossible to say without more specific information.
When will a change in pressure has no effect on the position of equilibrium? When only side of the reversible reaction has a gaseous species When the moles of gaseous species are equal on both sides of the reaction When the reaction is a homogeneous equilibrium When the reaction is a heterogeneous equilibrium
Why can an equilibrium be represented mathematically? Please explain!
Expline Fundamental equilibrium concepts and it consisted of the explain Le Chatelier’s principle to predict the shift of equilibrium
What is the relation between rate of forward reaction and backward reaction at equilibrium? A)rateofforwardreaction<rateofbackwardreaction B)Reaction is no more taking place C)rateofforwardreaction>rateofbackwardreaction D)rateofforwardreaction=rateofbackwardreaction
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If a reaction is carried out in the presence of a catalyst, will the amount of productpresent at equilibrium increase, decrease, or stay the same?
When a reaction's reaction quotient is smaller than its equilibrium constant, what does this indicate about the reaction's equilibrium? The reaction must proceed in the reverse direction to return to equilibrium. The reaction is at equilibrium and will not change. O The reaction must proceed in the forward direction to return to equilibrium. O Nothing. There is no relationship between the reaction quotient and equilibrium constant.
Nitrogen and oxygen react at high temperatures. What will happen to the concentrations of at equilibrium if a catalyst is added? Catalyst will be contaminated Double Nothing Depends on the catalyst
Most medications have an expiration date. Describe with respect to equilibrium, what occurring as the medication ages. Is there any of the medication left after the expiration date?
Which statement best describes general equilibrium? O Equilibrium is reached when the reaction stops. O There is only one set of equilibrium concentrations that equals the Kc value. At equilibrium, the rate of the forward reaction is the same as the rate of the reverse reaction. At equilibrium, the total concentration of products equals the total concentration of reactants.
Which of the following statements is not true about catalysts? A) Catalysts do not change the value of an equilibrium constant. B) Catalysts provide an alternative reaction pathway that effectively lowers the activation energy. O C) Catalysts can be recovered unchanged after a reaction completes. D) Catalysts alter the enthalpy of reaction.