Multiple Choice
Which of the following best describes the effect of activation energy on a chemical reaction?
15. Chemical Kinetics
Energy Diagrams
Back15. Chemical Kinetics
Energy Diagrams
- Multiple ChoiceWhich of the following correctly labels the key features of an energy diagram for a two-step reaction?
- Multiple ChoiceWhich point on an energy diagram for the reaction A → D represents the transition state?
- Multiple ChoiceWhich of the following processes is represented by an energy diagram where the products have lower energy than the reactants?1views
- Multiple ChoiceWhich of the following is a true statement about an energy diagram for an exothermic reaction?
- Multiple ChoiceThe activation energy for the reaction NO2(g) + CO(g) → NO(g) + CO2(g) is Ea = 100 kJ/mol and the change in enthalpy for the reaction is ΔH = -250 kJ/mol. What is the activation energy for the reverse reaction?2views
- Multiple ChoiceIn an energy-profile graph, the activated complex is represented at the:1views
- Multiple ChoiceThe activation energy of a reaction is 3.5 kJ/mol and the change in enthalpy for the forward reaction is -67.2 kJ/mol. What is the activation energy of the reverse reaction?
- Multiple ChoiceAn energy diagram for a chemical reaction shows seven distinct regions (bins) labeled as follows: (1) Reactants, (2) Activation energy, (3) Transition state, (4) Intermediate, (5) Second activation energy, (6) Second transition state, (7) Products. Which type of reaction does this energy diagram most likely represent?
- Multiple ChoiceIn fluorescence, how do the energies of excitation and emission compare? Which is greater?1views
- Multiple ChoiceWhich of the following best describes the qualitative energy diagram for the dissolution of LiI in water?
- Multiple ChoiceIn an energy diagram for a chemical reaction, what does the 'energy hill' represent?1views
- Multiple ChoiceWhich concept is commonly illustrated using energy diagrams to explain activation energy and how chemical reactions proceed?2views
- Multiple ChoiceIf an enzyme increases the rate of the hydrolysis reaction by a factor of 1 million, how much lower must the activation energy barrier be when sucrose is involved?
- Multiple ChoiceThe activation energy of a reaction is 3.5 kJ/mol and the change in enthalpy for the forward reaction is -67.2 kJ/mol. What is the activation energy of the reverse reaction?1views