During the course of a reaction the free energy decreases from point A to B to...
During the course of a reaction the free energy decreases from point A to B to C At point C the free energy increases from C to D to E. Point E is lower than point A Which is correct? 1) delta G is greater than 0 2) If the reaction is started at point B it is spontaneous in the reverse direction c) If the reaction is started at point D, it is spontaneous in the reverse direction d) delta G is greater than 0 at point C
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During the course of a reaction the free energy decreases from
point A to B to...
20. Which of the following statements is FALSE? A. The entropy of the universe increases during...
20. Which of the following statements is FALSE? A. The entropy of the universe increases during spontaneous processes. B. During chemical and physical changes, energy is conserved. C. The entropy of H2O liquid is greater than the entropy of H2O solid at 0°C. D. The entropy of O2(g) should be greater than the entropy of CO2(g) when at the same temperature, E. The absolute entropy of a substance generally decreases when temperature decreases.
14. Which of the following is not a state function? a. Internal Energy b. Free Energy...
14. Which of the following is not a state function? a. Internal Energy b. Free Energy c. Enthalpy d. Entropy e. Heat 15. The second law of thermodynamics states that a. the entropy of a perfect crystal is zero at 0 K b. the entropy of the universe is constant. c. the energy of the universe is increasing. d. the entropy of the universe is increasing. e. the energy of the universe is constant. 16. Which of the following are...
- O ENTROPY AND FREE ENERGY Calculating dg from dH and ds A chemical engineer is...
- O ENTROPY AND FREE ENERGY Calculating dg from dH and ds A chemical engineer is studying the two reactions shown in the table below. In each case, he fills a reaction vessel with some mixture of the reactants and products at a constant temperature of 131.0 °C and constant total pressure. Then, he measures the reaction enthalpy AH and reaction entropy AS of the first reaction, and the reaction enthalpy AH and reaction free energy AG of the second...
16. Gibb's Free Energy is a. the spontaneous energy of a reaction b. the chemical energy...
16. Gibb's Free Energy is a. the spontaneous energy of a reaction b. the chemical energy that can be used for performing work c. the non-spontaneous energy of a reaction d. the amount of activation energy needed for a reaction to start Based on the ∆G calculation, a student determined that a synthesis reaction should be spontaneous. When the student tries out the reaction, however, nothing happens. Which explanation is most plausible? the student probably made a mistake in the...
Home My courses This course Question 3 For the chemical reaction system described by the diagram...
Home My courses This course Question 3 For the chemical reaction system described by the diagram below, which statement is true Answer saved Points out of 1 Remove flag 15 16 17 18 Energi Reaction Progress h. The Select one: a. The forward reaction is exothermic. b. The activation energy for the forward reaction is greater than the activation energy for the forward reaction is greater than the activation energy for the reverse reaction. O C. At equilibrium, the activation...
Standard free energy change (Delta degree G) and cell potential (E degree) can be said to...
Standard free energy change (Delta degree G) and cell potential (E degree) can be said to measure the same thing and are convertible by the equation: Delta G degree = nF E degree _cell where n is the total number of moles of electrons being transferred, and F is Faraday constant 9.6- 1853415 times 10^C/mol. The free energy (Delta G degree) of a spontaneous reaction is always negative. For each of the electrochemical cells below, calculate the free energy of...
Question 5 The spontaneity of a reaction depends both on the enthalpy change, Delta H, and...
Question 5 The spontaneity of a reaction depends both on the enthalpy change, Delta H, and entropy change, Delta S. Reactions that release energy produce more stable products, and the universe tends toward disorder. Thus, an exothermic reaction with a positive entropy change will always be spontaneous. Mathematically, this relationship can be represented as where Delta G is the change in Gibbs free energy and T is the Kelvin temperature. If Delta G is negative, then the reaction is spontaneous....
Consider the reaction: N2(g) + 3H2(g) <---> 2NH3(g) The Gibbs free energy of formation ((delta)Gfo) for...
Consider the reaction: N2(g) + 3H2(g) <---> 2NH3(g) The Gibbs free energy of formation ((delta)Gfo) for ammonia is -16.5 kJ/mol and the reaction is exothermic. Calculate the (delta)Gorxn and the equilibrium constant for the reaction and clearly state whether K increases or decreases with temperature.
Given that a reaction absorbs energy and has an activation energy of 50kJ/mol, which of the...
Given that a reaction absorbs energy and has an activation energy of 50kJ/mol, which of the following statements are correct? 1) The reverse reaction has an activation energy equals to 50kJ/col 2) The reverse reaction has an activation energy less than 50kJ/col 3) The reverse reaction has an activation energy greater than 50kJ/col 4) The change in internal energy is less than zero 5) The change in internal energy is greater than Zero a) 1 and 4 b) 2 and...
46) All of the following have free energy of formation values of zero except a) Li...
46) All of the following have free energy of formation values of zero except a) Li (s) b) He (8) c) N (6) d) F2 (g) HF (B) If a process is both endothermic and spontaneous, then a) AU is less than 0 b) AH is less than 0 c) AG is greater than 0 d) AS is greater than 0 e) AH is equal to 0 48) The combination that always gives a spontaneous process is_ a) b) c)...
20. Which of the following statements is FALSE? A. The entropy of the universe increases during spontaneous processes. B. During chemical and physical changes, energy is conserved. C. The entropy of H2O liquid is greater than the entropy of H2O solid at 0°C. D. The entropy of O2(g) should be greater than the entropy of CO2(g) when at the same temperature, E. The absolute entropy of a substance generally decreases when temperature decreases.
14. Which of the following is not a state function? a. Internal Energy b. Free Energy c. Enthalpy d. Entropy e. Heat 15. The second law of thermodynamics states that a. the entropy of a perfect crystal is zero at 0 K b. the entropy of the universe is constant. c. the energy of the universe is increasing. d. the entropy of the universe is increasing. e. the energy of the universe is constant. 16. Which of the following are...
- O ENTROPY AND FREE ENERGY Calculating dg from dH and ds A chemical engineer is studying the two reactions shown in the table below. In each case, he fills a reaction vessel with some mixture of the reactants and products at a constant temperature of 131.0 °C and constant total pressure. Then, he measures the reaction enthalpy AH and reaction entropy AS of the first reaction, and the reaction enthalpy AH and reaction free energy AG of the second...
Home My courses This course Question 3 For the chemical reaction system described by the diagram below, which statement is true Answer saved Points out of 1 Remove flag 15 16 17 18 Energi Reaction Progress h. The Select one: a. The forward reaction is exothermic. b. The activation energy for the forward reaction is greater than the activation energy for the forward reaction is greater than the activation energy for the reverse reaction. O C. At equilibrium, the activation...
Standard free energy change (Delta degree G) and cell potential (E degree) can be said to measure the same thing and are convertible by the equation: Delta G degree = nF E degree _cell where n is the total number of moles of electrons being transferred, and F is Faraday constant 9.6- 1853415 times 10^C/mol. The free energy (Delta G degree) of a spontaneous reaction is always negative. For each of the electrochemical cells below, calculate the free energy of...
Question 5 The spontaneity of a reaction depends both on the enthalpy change, Delta H, and entropy change, Delta S. Reactions that release energy produce more stable products, and the universe tends toward disorder. Thus, an exothermic reaction with a positive entropy change will always be spontaneous. Mathematically, this relationship can be represented as where Delta G is the change in Gibbs free energy and T is the Kelvin temperature. If Delta G is negative, then the reaction is spontaneous....
46) All of the following have free energy of formation values of zero except a) Li (s) b) He (8) c) N (6) d) F2 (g) HF (B) If a process is both endothermic and spontaneous, then a) AU is less than 0 b) AH is less than 0 c) AG is greater than 0 d) AS is greater than 0 e) AH is equal to 0 48) The combination that always gives a spontaneous process is_ a) b) c)...
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