4. Which of the following statements is not true of a spontaneous process? (A) The enthalpy value is negative (B) The entropy value is negative (C) The free energy value is positive (D) The work value is negative (E) The enthalpy value is positive

6. Planarity of the peptide bond means that rotation is allowed about the bond linking ___________the and the carbon of the peptide bond, and also about the bond linking the___________ to the adjacent α-carbon. (A) a-carbon, carbony1 carbon (B) B-carbon, carbonyl carbon (C) carbonyl carbon, nitrogen of the peptide bond (D) a-carbon, nitrogen of the peptide bond (E) none are true

4. Which of the following statements is not true of a spontaneous process?
(A) The enthalpy value is negative
(B) The entropy value is negative
(C) The free energy value is positive
(D) The work value is negative
(E) The enthalpy value is positive

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