which of the following are true regarding chemical equilibrium (choose all that are true) a. chemical equilibrium only occurs if the ΔH is very large and negative b. the rate of the forward reaction is the same as the back reaction c. there is an equal amount of products and reactants d. the ΔH and Ea are relatively small
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which of the following are true regarding
a. chemical equilibrium only occurs if the ΔH is very large and negative
b. the rate of the forward reaction is the same as the back reaction
c. there is an equal amount of products and reactants
d. the ΔH and Ea are relatively small
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- Which two of the following apply to the products of an exergonic reaction? A. Have less energy than the reactants B. Are less ordered than the reactants C. Are more ordered than the reactants D. Have more energy than the reactantsif the reaction given below occurs and pure A and B were mixed, which of the following would take place as equilibrium was established A + B ⇌ C a. the concentration of C would increase for a time, then remain constant b. the concentration of A would increase for a time, then decrease c. the concentration of B would increase for a time, then remain constantThe following equation, which represents the oxidative breakdown of glucose by body cells, is a reversible reaction. Glucose + oxygen S carbon dioxide + water + ATP (a) How can you indicate that the reaction is reversible? (b) Howcan you indicate that the reaction is in chemical equilibrium? (c) Define chemical equilibrium.
- A chemical reaction is more likely to occur spontaneously if A. the products of the reaction are more complex than the reactants. B. the system takes up heat from its surroundings. C. the products of the reaction are more disordered than the reactants. D. the system gains free energy.An enzyme accelerates chemical reactions by all of the following, EXCEPT: a) Bringing reactants close together b) Shifting equilibrium to favor the products c) Adding temporary charges to substrates d) Orienting chemical bonds for best reactivity e) Straining chemical bonds that will be brokenWhich statement is true regarding the function of a catalyst in a chemical reaction? a) A catalyst increases the rate of a reaction. b) A catalyst provides an alternate mechanism for the reaction. c) A catalyst is not consumed by the reaction. d) All of the above are true.
- Which of the following is true for all exergonic reactions? Group of answer choices A. The reactions are nonspontaneous B. A net input of energy from the surroundings is required for the reactions to proceed C. Some reactants will be converted to products D. The products have more total energy than the reactants E. The reaction proceeds with a net release of free energyWhy is it important to select a good stationary phase? a) To retain the desired molecules and separate them from the rest of the sample b) To create a good flow path through the system ) To detect all the molecules in the sample at the same time d) To ensure the sample remains properly mixedWhich of the following statements is FALSE regarding all reactions of the type A <=> B at equilibrium? a) net velocity (V) = 0 b) V of forward reaction = V of reverse reaction c) kf = kr d) ∆Gactual = 0
- The rate of removal of alcohol from the bloodstream stays the same, regardless of the concentration of blood alcohol. What term do we use to describe this reaction rate law? A A first order reaction B A zeroth order reaction C A complex order reaction D A second order reactionGiven the diagram below: A. Please explain using specific equations below how this process is relevant to the study of equilibrium. B. Why is this process an excellent example of the physiological relevance of pH and equilibrium concepts in chemistry in the biological sciences?Which of the following is not true about enzymes? a. They are consumed by the reactions they catalyze. b. They are usually made of amino acids. c. They lower the activation energy of chemical reactions. d. Each one is specific to the particular substrate(s) to which it binds.