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Questions and Answers
According to the first law of thermodynamics, what is true about the total energy of a system?
According to the first law of thermodynamics, what is true about the total energy of a system?
- The total energy of a system, including its surroundings, remains constant. (correct)
- The total energy of a system can be created or destroyed during a change.
- The total energy of a system is constantly decreasing.
- The total energy of a system is constantly increasing.
What does the second law of thermodynamics state about the entropy of a system?
What does the second law of thermodynamics state about the entropy of a system?
- The entropy of a system has no bearing on whether a process will occur spontaneously.
- The entropy of a system must always remain constant for a process to occur spontaneously.
- The entropy of a system must always decrease for a process to occur spontaneously.
- The entropy of a system must always increase for a process to occur spontaneously. (correct)
Which of the following best describes the relationship between Gibbs free energy change (ΔG) and the changes in enthalpy (ΔH) and entropy (ΔS) during a chemical reaction?
Which of the following best describes the relationship between Gibbs free energy change (ΔG) and the changes in enthalpy (ΔH) and entropy (ΔS) during a chemical reaction?
- ΔG = ΔH + TΔS
- ΔG = ΔH - TΔS (correct)
- ΔG = ΔH * TΔS
- ΔG = ΔH / TΔS
Which of the following statements about the Gibbs free energy change (ΔG) is correct?
Which of the following statements about the Gibbs free energy change (ΔG) is correct?
Which of the following statements about the relationship between ΔG, ΔH, and ΔS is correct?
Which of the following statements about the relationship between ΔG, ΔH, and ΔS is correct?
Which of the following statements about the relationship between Gibbs free energy (G) and the spontaneity of a reaction is correct?
Which of the following statements about the relationship between Gibbs free energy (G) and the spontaneity of a reaction is correct?
What does a negative ΔG value indicate about a reaction?
What does a negative ΔG value indicate about a reaction?
In which scenario is ΔG zero?
In which scenario is ΔG zero?
What happens if ΔG is a positive number?
What happens if ΔG is a positive number?
What is the significance of ΔG°′ in biochemistry?
What is the significance of ΔG°′ in biochemistry?
What does it mean when ΔG has a great magnitude in a reaction?
What does it mean when ΔG has a great magnitude in a reaction?
How does ΔG allow prediction of the direction of a reaction?
How does ΔG allow prediction of the direction of a reaction?
What is the relationship between the Gibbs free energy change (ΔG) and the standard free-energy change (ΔG°) for a chemical reaction?
What is the relationship between the Gibbs free energy change (ΔG) and the standard free-energy change (ΔG°) for a chemical reaction?
What is the significance of the standard free-energy change (ΔG°) in chemical reactions?
What is the significance of the standard free-energy change (ΔG°) in chemical reactions?
How is the equilibrium constant (K'eq) related to the standard free-energy change (ΔG°')?
How is the equilibrium constant (K'eq) related to the standard free-energy change (ΔG°')?
What is the difference between exergonic and endergonic processes in biological systems?
What is the difference between exergonic and endergonic processes in biological systems?
What is the significance of coupling in biological systems?
What is the significance of coupling in biological systems?
Which statement about the laws of thermodynamics is correct?
Which statement about the laws of thermodynamics is correct?
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