A spontaneous reaction is one in which the change in free energy (ΔG) has a _______ value. (a) positive (b) negative (c) positive or negative (d) none of the preceding (ΔG has no measurable value)
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A spontaneous reaction is one in which the change in free energy (ΔG) has a _______ value. (a) positive (b) negative (c) positive or negative (d) none of the preceding (ΔG has no measurable value)
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- Figure 6.8 Look at each of the processes shown, and decide if it is endergonic or exergonic. In each case, does enthalpy increase or decrease, and does entropy increase or decrease?Which of the following statements is true? (a) The largerthe Q, the larger the ΔG°. (b) If Q = 0, the system is at equilibrium.(c) If a reaction is spontaneous under standardconditions, it is spontaneous under all conditions. (d) Thefree-energy change for a reaction is independent of temperature.(e) If Q > 1, ΔG > ΔG°.Label the following statements true or false: (c) A nonspontaneous reaction will proceed spontaneously in the reverse direction. (d) A spontaneous process can occur with a large decrease in entropy.
- What terms would best describe the above coupled reaction?A. it is non-spontaneous and endothermic (because the overall Go is positive)B. it is spontaneous and exothermic (because the overall Go is positive)C. it is non-spontaneous and exothermic (because the overall Go is positive)D. it is spontaneous and exothermic (because the overall Go is negative)E. it is non-spontaneous and endothermic (because the overall Go is negative)Which answers apply. (There could be more than one) Hydrolysis of ATP into ADP and inorganic phosphate releases energy because the reaction... a.) oxidizes ATP b.) reduces ATP c.) increases resonance d.) decreases resonance e.) increases entropy f.) decreases entropyImagine you are working in a lab, and you are performing two chemical reactions. You notice that Reaction A occurs much faster than Reaction B, and that both reactions release the same amount of heat. Which of the following conclusions can be made from your observation? Reaction A has the same activation energy as Reaction B, and the AG of Reaction A is more negative (i.e., a larger negative number) than the AG for Reaction B. Reaction A has a lower activation energy than Reaction B, and the AG of Reaction A is the same as the AG of Reaction B. Reaction A has a higher activation energy than Reaction B, and the AG of Reaction A is the same as the AG of Reaction B. Reaction A has the same activation energy as Reaction B, and the AG of Reaction A is less negative (i.e., a smaller negative number) than the AG for Reaction B.
- Which one of the following statements is completely TRUE? O When AG > 0, the reaction is BOTH product-favored (spontaneous) AND endergonic. When AG 0, the reaction is BOTH reactant-favored (nonspontaneous) AND endergonic. When AG > 0, the reaction is BOTH product-favored (spontaneous) AND exergonic. When AG > 0, the reaction is BOTH reactant-favored (nonspontaneous) AND exergonic. When AG < 0, the reaction is BOTH reactant-favored (nonspontaneous) AND exergonic.Define the following terms. (i) Rate constant (k) (ii) Activation energy (Ea)What do the following indicators tell you about whether a reaction can proceed as written? (a) The standard free-energy change is positive. (b) The free-energy change is positive. (c) The reaction is exergonic
- Consider the generic reaction2A+3B→2C,ΔHrxn=−100kJIf a reaction mixture initially contains 5 mol of A and 6 mol of B, how much heat (in kJ) will have evolved once the reaction has occurred to the greatest extent possible? 150kj 200kj 300kj 100kJChoose the best description of an enzyme: (a) It allows a chemical reaction to proceed extremely fast. (b) It increases the rate at which a chemical reaction approaches equilibrium relative to its uncatalyzed rate. (c) It makes a reaction thermodynamically favorable.Define potential energy and kinetic energy and provide two specific examples of each. Explain how one form of energy can be converted into another. Will some energy be lost during this conversion? If so, what form will it take?