Homework Answers
a. The concentration of any reactants or products in liquid or solid phase is not considered in writing the equilibrium constant because they are constant. So, the equilibrium constant is
Kc = [D]4/([B]3[C]2)
b. There are more moles of gases on the product side. So, increasing volume will lead to a lower reaction quotient. So the equilibrium will shift towards the products.
c. The reaction is endothermic. So, increasing temperature will increase the forward reaction rate. So, the equilibrium will shift towards products.
d. A is not involved in the equilateral constant equation. So, adding A will have no effect.
e. Yes. K will change in c. Because the equilibrium constant depends upon temperature. So, K will change if we increases the temperature. K will increase to be more precise.
Comment if any problem
A (1) +3B (g) + 2 (aq) + 4D(g) + 7E(s) AH = 25 kJ/mole a)...
A (1) +3B (g) + 2 (aq) + 4D(g) + 7E(s) AH = 25 kJ/mole a) Write the equilibrium constant expression b) Would the reaction shift toward the products or reactants if the volume of the sealed react container was suddenly doubled? Would the reaction shift toward the products or reactants if the temperature was increase d) Would the reaction shift toward the products or reactants if more A was added? e) Would the value of K change in any...
Consider the following equilibrium reaction. P4S3(g) + 8O2(g) = P4010(s) + 3SO2(9) AH = -3677 kJ...
Consider the following equilibrium reaction. P4S3(g) + 8O2(g) = P4010(s) + 3SO2(9) AH = -3677 kJ If heat is removed from an equilibrium mixture of P4S3, P4010, O2, and SO2, then O Keq will decrease. the system will remain at equilibrium with no change in concentrations. the system will shift toward reactants to re-achieve equilibrium. O the system will shift toward products to re-achieve equilibrium. more information is needed to determine the effect on the equilibrium.
Again, consider the exothermic reaction, with K=3.00: 2A(aq) + B(g) ⇌ C(aq) + D(g) With initial c...
Again, consider the exothermic reaction, with K=3.00: 2A(aq) + B(g) ⇌ C(aq) + D(g) With initial concentrations of [A] = 0.5M, [B] = 2.0M, [C] = 1.0M, and [D] = 1.5M. For each of the following disruptions, predict weather the reaction will go forward (toward products), reverse (towards reactants), or be unchanged. a) [A] increased to 2.0M b) Pressure doubled. c) Volume of solution doubled by dilution. d) The temperature is increased by 100.0oC (15.83 from text) When 1.50mol CO2...
For the reaction shown below, ΔH° = -61.9 kJ mol-1 and ΔS° = -76.7 J K-1...
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For the following equilibrium: N_2(g) + H_2(g) rightarrow NH_3(g) delta H= -386 kJ/mole Predict the direction...
For the following equilibrium: N_2(g) + H_2(g) rightarrow NH_3(g) delta H= -386 kJ/mole Predict the direction the equilibrium will shift if: N_2 is added? H_2 is removed? NH_3 is added? NH_3 is removed? the volume of the container is decreased? the pressure is increased by adding Argon gas? the reaction is cooled? equal number of moles of H_2 and NH_3 are added? a catalyst is added The equilibrium constant for the following reaction is 5.0 at 400 degree C. CO_(g)...
5. (20 pts) Consider the following reaction OF2(g) + H2O(g) ---> 2 HF(g) + O2(g) AH.(kJ/mole)=-318 kJ/mole (a) U...
5. (20 pts) Consider the following reaction OF2(g) + H2O(g) ---> 2 HF(g) + O2(g) AH.(kJ/mole)=-318 kJ/mole (a) Using this information along with data in the appendix of your textbook, calculate AH (OF,(g)) in kJ/mole at 25°C. (b) If 15.0 g of OF2(g) and 10.0 g of H2Og) react, how much heat, expressed in kJ is released? Hint: First calculate the limiting reagent.
Le Chateler's principle In the chart below: • Indicate the color of each solution as darker...
Le
Chateler's principle
In the chart below: • Indicate the color of each solution as darker or lighter than the control after the addition of the specified substance. • Indicate the direction the equilibrium shifted as "toward products" or "toward reactants" based on the color change. • Based on the direction of the shift, indicate the substance(s) that increased which will either be the two reactants present on the reactant side of the equilibrium equation or the complex present on...
#4.(25pts) Consider the reaction AH (kJ/mole) 5 CO2(g) + SizN() ----> 3 SiO(g) + 2 N2O(s)...
#4.(25pts) Consider the reaction AH (kJ/mole) 5 CO2(g) + SizN() ----> 3 SiO(g) + 2 N2O(s) + 5 CO(g) AH = 2023.75 kJ/mole (1) Use the above information as well as heat of formation data in the appendix of your textbook to calculate AH (Si,N.(s)) in kJ/mole. Additional information: AH (SiO(g)) = 1.94 x 109 kJ/mole 6) How many kJ of heat are absorbed when 1.2 lbs of Si N.(s) react according to the above equation? 1 lb = 453.6...
Now let us do some Le Chatelier C(s)+H2O (g)←→CO (g) +H2 (g)AH-+131 kJ (in case you...
Now let us do some Le Chatelier C(s)+H2O (g)←→CO (g) +H2 (g)AH-+131 kJ (in case you don't remember, this is an endothermic reaction). 4. A rigid container holds a mixture of graphite pellets (C(s)), water vapor, carbon monoxide gas, and hydrogen gas at equilibrium. State whether the number of moles of CO (g) in the container will increase, decrease, or remain the same after each of the following disturbances is applied to the original mixture. For each case, assume that...
Consider the following reversible reaction: A(g) + 3B(g) ⇌ AB3(g) \DeltaΔH = -245 kJ/mol On your Calcs...
Consider the following reversible reaction: A(g) + 3B(g) ⇌ AB3(g) \DeltaΔH = -245 kJ/mol On your Calcs sheet, please do the following: a) write the expression for the equilibrium constant for this reaction. b) discuss what effect (if any) would EACH of the following procedures have on the equilibrium, and explain the reason(s.) In here, choose the option that would cause a change in the equilibrium constant. Increasing the volume of the reaction container. Increasing the concentration of product AB3 Increasing...
A (1) +3B (g) + 2 (aq) + 4D(g) + 7E(s) AH = 25 kJ/mole a) Write the equilibrium constant expression b) Would the reaction shift toward the products or reactants if the volume of the sealed react container was suddenly doubled? Would the reaction shift toward the products or reactants if the temperature was increase d) Would the reaction shift toward the products or reactants if more A was added? e) Would the value of K change in any...
Consider the following equilibrium reaction. P4S3(g) + 8O2(g) = P4010(s) + 3SO2(9) AH = -3677 kJ If heat is removed from an equilibrium mixture of P4S3, P4010, O2, and SO2, then O Keq will decrease. the system will remain at equilibrium with no change in concentrations. the system will shift toward reactants to re-achieve equilibrium. O the system will shift toward products to re-achieve equilibrium. more information is needed to determine the effect on the equilibrium.
For the following equilibrium: N_2(g) + H_2(g) rightarrow NH_3(g) delta H= -386 kJ/mole Predict the direction the equilibrium will shift if: N_2 is added? H_2 is removed? NH_3 is added? NH_3 is removed? the volume of the container is decreased? the pressure is increased by adding Argon gas? the reaction is cooled? equal number of moles of H_2 and NH_3 are added? a catalyst is added The equilibrium constant for the following reaction is 5.0 at 400 degree C. CO_(g)...
5. (20 pts) Consider the following reaction OF2(g) + H2O(g) ---> 2 HF(g) + O2(g) AH.(kJ/mole)=-318 kJ/mole (a) Using this information along with data in the appendix of your textbook, calculate AH (OF,(g)) in kJ/mole at 25°C. (b) If 15.0 g of OF2(g) and 10.0 g of H2Og) react, how much heat, expressed in kJ is released? Hint: First calculate the limiting reagent.
Le
Chateler's principle
In the chart below: • Indicate the color of each solution as darker or lighter than the control after the addition of the specified substance. • Indicate the direction the equilibrium shifted as "toward products" or "toward reactants" based on the color change. • Based on the direction of the shift, indicate the substance(s) that increased which will either be the two reactants present on the reactant side of the equilibrium equation or the complex present on...
#4.(25pts) Consider the reaction AH (kJ/mole) 5 CO2(g) + SizN() ----> 3 SiO(g) + 2 N2O(s) + 5 CO(g) AH = 2023.75 kJ/mole (1) Use the above information as well as heat of formation data in the appendix of your textbook to calculate AH (Si,N.(s)) in kJ/mole. Additional information: AH (SiO(g)) = 1.94 x 109 kJ/mole 6) How many kJ of heat are absorbed when 1.2 lbs of Si N.(s) react according to the above equation? 1 lb = 453.6...
Now let us do some Le Chatelier C(s)+H2O (g)←→CO (g) +H2 (g)AH-+131 kJ (in case you don't remember, this is an endothermic reaction). 4. A rigid container holds a mixture of graphite pellets (C(s)), water vapor, carbon monoxide gas, and hydrogen gas at equilibrium. State whether the number of moles of CO (g) in the container will increase, decrease, or remain the same after each of the following disturbances is applied to the original mixture. For each case, assume that...
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