Chemical kinetics Questions

Physical Chemistry

Chemical kinetics Solutions

For the reaction A + B -> C the rate law is determined to be rate = (0.25 M.s)[A][B]. Which of the following will increase the rate of the reaction? Please mark all that apply, and only those that apply. a. all of these will increase the rate. b. decreasing the temperature of the reaction c. increasing the concentration of reactant [A] d. increasing the concentration of reactant [B] e. increasing the concentration of product [C]

Physical Chemistry

Chemical kinetics Solutions

20. the first order reaction A -> B has a half-life of 322.6 seconds. If the reaction is initiated with [A]₀ =2.580 M, how much time must pass before the remaining [A]t =0.683 M? 21. The balanced chemical equation and experimentally determined rate law are listed below for five different reactions. Of these, only __________could represent an elementary step. [A] A + B + C -> P rate = k[A][C] [B] A + 2B -> P rate = k[A][B]² [C] A + 2B -> P rate = k[A]² [D] A + B → P rate = k[A]²[B] [E] 2A -> P rate = k[A]

Physical Chemistry

Chemical kinetics Solutions

Under certain conditions the rate of this reaction is zero order in ammonia with a rate constant of 0.010 M-s‾¹ : 2NH₃(g) → N₂(g) + 3H₂ (g) Suppose a 250. mL flask is charged under these conditions with 500. mmol of ammonia. How much is left 50. s later? You may assume no other reaction is important. Be sure your answer has a unit symbol, if necessary, and round it to the correct number of significant digits.

Physical Chemistry

Chemical kinetics Solutions

Under certain conditions the rate of this reaction is zero order in ammonia with a rate constant of 0.010 M-s‾¹: 2NH₃(g) → N₂(g) + 3H₂(g) Suppose a 250. mL flask is charged under these conditions with 500. mmol of ammonia. How much is left 50. s later? You may assume no other reaction is important. Be sure your answer has a unit symbol, if necessary, and round it to the correct number of significant digits.

Physical Chemistry

Chemical kinetics Solutions

Under certain conditions the rate of this reaction is zero order in ammonia with a rate constant of 0.010 M-s‾¹: 2NH₃(g) → N₂(g) + 3H₂(g) Suppose a 250. mL flask is charged under these conditions with 500. mmol of ammonia. How much is left 50 s later? You may assume no other reaction is important. Be sure your answer has a unit symbol, if necessary, and round it to the correct number of significant digits.

Physical Chemistry

Chemical kinetics Solutions

004 (part 1 of 4) 10.0 points Consider the energy diagram 45 Energy (kJ) 0.0 -45 Forward Reverse Find AE forward Answer in units of kJ/mol. 005 (part 2 of 4) 10.0 points Find AEreverse Answer in units of kJ/mol. 006 (part 3 of 4) 10.0 points Find Eq. Answer in units of kJ/mol. 007 (part 4 of 4) 10.0 points Find E Answer in units of kJ/mol.

Physical Chemistry

Chemical kinetics Solutions

Question 1 5 pts Activated complex 400 (b) Products 300 Potential Energy (a) 200 (c) 100 Reactants Reaction Pathway Use your knowledge of the collision theory and use the potential energy diagram given to answer questions 1 through 5. Which letter represents the activation energy? O None of the above OA OB OC Next →

Physical Chemistry

Chemical kinetics Solutions

Question 2 5 pts Activated complex 400 (b) 300 Products Potential Energy (a) 200 (c) 100 Reactants Reaction Pathway What is represented by the letter "b"? O Forward Activation Energy Activated Complex O Potential energy of the products O Reverse Activation Energy

Physical Chemistry

Chemical kinetics Solutions

1. First, we will build a model for the total amount of drugs in the gut. At time t = 0,10mg of the drug is present in the gut. From the gut, it passes slowly into the blood. The passage of the drug to the blood has first-order kinetics; that is, every hour 42% of the drug remaining in the gut is passed from the gut into the blood. No more pills are taken, so no extra drug is added to the gut. Let at be the sequence representing the amount of Adderall XR in the patient's gut t hours after the pill was taken. Write down a recursion relation for at. 2. Find an explicit formula for at. 3. Calculate the time at which the amount of drug remaining in the gut drops to 1% of its starting value; that is, findt for which at = 0.01ao -

Physical Chemistry

Chemical kinetics Solutions

1. synonym for activated complex catalyst 2. speed of a change that occurs over time transition state 3. substance that slows down a reaction collision theory rate 4. Particles can react to form products when they collide, provided they have enough kinetic energy activation energy 5. substance that increases the rate of a reaction without being used up inhibitor > 6. minimum energy particles must have in order to react

Physical Chemistry

Chemical kinetics Solutions

Question 7 (1 point) The reaction equation is: Fe2O3 (s) + 2 Al (s) = 2 Fe (s) + A1203 (s) For this reaction, AH = -851.5 kJ and AS = -38.58 J/K. Which of the following statements is true about the process? O Enthalpy favours the reactants and entropy favours the products Both driving forces favour the products Enthalpy favours the products and entropy favours the reactants Both driving forces favour the reactants

Physical Chemistry

Chemical kinetics Solutions

200 172 kJ ts 160 155 kJ PE (kJ) 120 112 kJ 102 kJ 80 40 40 kJ Reaction Progress Created by E. Lee for Virtual Virginia (2021) Question 4 [2 pts]: (First name A through M) How would you explain the value of 62 kJ (i.e., what does this value represent)? (First name N through Z) How would you explain the value of 115 kJ (i.e., what does this value represent)?