Homework Answers
Solution :
Option A is correct
in adiabatic reactor heat supplied is zero also change in entropy is zero at equilibrium conditions.
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1.2 For an endothermic reaction, which reactor operation will be most limited by equilibrium? a) Adiabatic...
E. An endothermic reaction occurs in an adiabatic reactor. No work is done. What do you...
E. An endothermic reaction occurs in an adiabatic reactor. No work is done. What do you expect the temperature of the reactor to be after the reaction, relative to the temperature before the reaction occurred? Circle and explain your answer to receive full credit. (4 pts) a. Greater after the reaction. b. Less after the reaction. c. The temperature is the same before and after reaction. d. Not enough information to tell.
QUESTION 2: Design of Multiple Reactors: 30 marks B +C was a a) An elementary reaction...
QUESTION 2: Design of Multiple Reactors: 30 marks B +C was a a) An elementary reaction A reaction A B +C was carried out in a reactor system using an ideal STR followed by an ideal PER Isothermany. The rate constant is k = 0.4 min ". The volumetric flow rate is 20 L/min. The concentration of A in the feed is 5 moles/L. 1. Calculate the volume of the CSTR necessary to achieve a conversion of 50%. (7 marks)...
Which of the following is true regarding endothermic and exothermic reactions? a reaction which releases energy...
Which of the following is true regarding endothermic and exothermic reactions? a reaction which releases energy is exothermic areaction which absorbs energy is endothermic in an exothermic reaction, heat is released in an endothermic reaction, heat is absorbed all of the above are true Oonly a andc are true only b and d are true
Problem 7 The gas-phase reaction, 2A2 + B2 2A2B, is carried out in a constant- volume reactor (volume V) at temperature T. No g-moles each of A2 and B2 are charged to the reactor, which is evacuated...
Problem 7 The gas-phase reaction, 2A2 + B2 2A2B, is carried out in a constant- volume reactor (volume V) at temperature T. No g-moles each of A2 and B2 are charged to the reactor, which is evacuated initially, and the reaction proceeds to equilibrium. The equilibrium constant Ka of the reaction-which is based on the pure-component standard state of 1 atm and temperature T-is known. The reaction mixture behaves as an ideal-gas mixture. (a) Express the conversion of A2 and...
Q(22) Kp=Kc when? A) The reaction is at equilibrium B) The reaction is exothermic C) The reaction is endothermic D)...
Q(22) Kp=Kc when? A) The reaction is at equilibrium B) The reaction is exothermic C) The reaction is endothermic D) all of the gasses present are at the same temperature E) the number of moles of gas on both sides of the balanced equation is the same. Q(23) HAH +A at the equilibrium (HA) = 1.65* 10-2 M and [H") = (A-) = 5.44*10-4 M at equilibrium. Kc = A) 1.7 X 10-1 C) 1.7 X 103 D) 1.7 X...
8. According to Le Chatelier, adding heat to an endothermic equilibrium reaction will cause: (A) No...
8. According to Le Chatelier, adding heat to an endothermic equilibrium reaction will cause: (A) No change (B) Products to form (C) Reactants to form 9. At a given temperature, Kc = 3.0 for the hypothetical reaction, A(g) +B(g) = C(g) If [A] = 2.0 M, [B] = 1.5 M, and [C]=9.0 M, is the reaction at equilibrium? If not, which way will it go? (A) No, to the left (B) No, to the right (C) It is at equilibrium...
R1 - LIQUID PHASE CHEMICAL REACTOR The elementary liquid phase reaction given below is carried out...
R1 - LIQUID PHASE CHEMICAL REACTOR The elementary liquid phase reaction given below is carried out in a CSTR by isothermal operation. k > NaOAC + EtOH k = 3.59 L/mol.min NaOH + EtOAC (A) (B) (C) (D) The volume of the CSTR is 2 L and the flowrates of the feeds in the individual streams are 50 ml/min for both reactants. The concentrations of NaOH and EtoAc are 0.05 mol/L and 0.1 mol/L, respectively. [6] a) Calculate the conversion...
6) When a spontaneou s, endothermic reaction occurs at constant temperature and pressure, the entropy change...
6) When a spontaneou s, endothermic reaction occurs at constant temperature and pressure, the entropy change of the surroundings is: a) impossible to tell b) positive c) negative d) zero a) ΔG > 0 One finds that the equilibrium constant for a particular reaction increases with increasing temperature. Assuming that the standard reaction enthalpy and entropy are temperature independent, this means that: a) The standard reaction enthalpy is less than zero 8) b) The standard reaction entropy is greater than...
Question 1: Design of isothermal reactors 30 Marks The irreversible, gas-phase reaction A+B D is to be carried out...
Question 1: Design of isothermal reactors 30 Marks The irreversible, gas-phase reaction A+B D is to be carried out in an isotherma °C) plug-flow reactor (PFR) at 5.0 atm. The mole fractions of the feed streams are A 0 B 0.50, and inerts 0.30. The activation energy for the above reaction is 80 000 cal/mol. the pressure drop due to fluid friction in the reactor is so small that it can be ignored, perform the following tasks: 2T a s...
xe 1. For any given reaction, a plot of 1/(-A) vs X yields a curve whose...
xe 1. For any given reaction, a plot of 1/(-A) vs X yields a curve whose integral is inversely proportional to the volume of a PFR. b. which may be increasing or decreasing. whose circumscribed rectangular area for given conversion yields CSTR volume. Only b and c above. All of the above. e. In the design of non-isothermal reactors, the energy and mole balances must be solved simultaneously. adiabatic reactors do not require a heat input term. the Arhenius equation...
E. An endothermic reaction occurs in an adiabatic reactor. No work is done. What do you expect the temperature of the reactor to be after the reaction, relative to the temperature before the reaction occurred? Circle and explain your answer to receive full credit. (4 pts) a. Greater after the reaction. b. Less after the reaction. c. The temperature is the same before and after reaction. d. Not enough information to tell.
QUESTION 2: Design of Multiple Reactors: 30 marks B +C was a a) An elementary reaction A reaction A B +C was carried out in a reactor system using an ideal STR followed by an ideal PER Isothermany. The rate constant is k = 0.4 min ". The volumetric flow rate is 20 L/min. The concentration of A in the feed is 5 moles/L. 1. Calculate the volume of the CSTR necessary to achieve a conversion of 50%. (7 marks)...
Which of the following is true regarding endothermic and exothermic reactions? a reaction which releases energy is exothermic areaction which absorbs energy is endothermic in an exothermic reaction, heat is released in an endothermic reaction, heat is absorbed all of the above are true Oonly a andc are true only b and d are true
Problem 7 The gas-phase reaction, 2A2 + B2 2A2B, is carried out in a constant- volume reactor (volume V) at temperature T. No g-moles each of A2 and B2 are charged to the reactor, which is evacuated initially, and the reaction proceeds to equilibrium. The equilibrium constant Ka of the reaction-which is based on the pure-component standard state of 1 atm and temperature T-is known. The reaction mixture behaves as an ideal-gas mixture. (a) Express the conversion of A2 and...
Q(22) Kp=Kc when? A) The reaction is at equilibrium B) The reaction is exothermic C) The reaction is endothermic D) all of the gasses present are at the same temperature E) the number of moles of gas on both sides of the balanced equation is the same. Q(23) HAH +A at the equilibrium (HA) = 1.65* 10-2 M and [H") = (A-) = 5.44*10-4 M at equilibrium. Kc = A) 1.7 X 10-1 C) 1.7 X 103 D) 1.7 X...
8. According to Le Chatelier, adding heat to an endothermic equilibrium reaction will cause: (A) No change (B) Products to form (C) Reactants to form 9. At a given temperature, Kc = 3.0 for the hypothetical reaction, A(g) +B(g) = C(g) If [A] = 2.0 M, [B] = 1.5 M, and [C]=9.0 M, is the reaction at equilibrium? If not, which way will it go? (A) No, to the left (B) No, to the right (C) It is at equilibrium...
R1 - LIQUID PHASE CHEMICAL REACTOR The elementary liquid phase reaction given below is carried out in a CSTR by isothermal operation. k > NaOAC + EtOH k = 3.59 L/mol.min NaOH + EtOAC (A) (B) (C) (D) The volume of the CSTR is 2 L and the flowrates of the feeds in the individual streams are 50 ml/min for both reactants. The concentrations of NaOH and EtoAc are 0.05 mol/L and 0.1 mol/L, respectively. [6] a) Calculate the conversion...
6) When a spontaneou s, endothermic reaction occurs at constant temperature and pressure, the entropy change of the surroundings is: a) impossible to tell b) positive c) negative d) zero a) ΔG > 0 One finds that the equilibrium constant for a particular reaction increases with increasing temperature. Assuming that the standard reaction enthalpy and entropy are temperature independent, this means that: a) The standard reaction enthalpy is less than zero 8) b) The standard reaction entropy is greater than...
Question 1: Design of isothermal reactors 30 Marks The irreversible, gas-phase reaction A+B D is to be carried out in an isotherma °C) plug-flow reactor (PFR) at 5.0 atm. The mole fractions of the feed streams are A 0 B 0.50, and inerts 0.30. The activation energy for the above reaction is 80 000 cal/mol. the pressure drop due to fluid friction in the reactor is so small that it can be ignored, perform the following tasks: 2T a s...
xe 1. For any given reaction, a plot of 1/(-A) vs X yields a curve whose integral is inversely proportional to the volume of a PFR. b. which may be increasing or decreasing. whose circumscribed rectangular area for given conversion yields CSTR volume. Only b and c above. All of the above. e. In the design of non-isothermal reactors, the energy and mole balances must be solved simultaneously. adiabatic reactors do not require a heat input term. the Arhenius equation...
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