2. Choose the correct statement.
Exothermic reactions are always spontaneous High temperature ensures a spontaneous reaction Free energy is independent of temperature A reaction with negative DS cannot be spontaneous none of the above
3. Which of the following will be true when a pure substance in liquid phase freezes spontaneously?
DG, DH, and DS are all positive DG, DH, and DS are all positive
4. Which statement is TRUE?
DS decreases with an increase in volume free energy is independent of volume free energy is independent of pressure free energy is dependent on pressure none of the above
5. Choose the CORRECT statement:
Exothermic reactions are always spontaneous Free energy is independent of temperature. A reaction which exhibits a negative value of D S cannot be spontaneous. At constant P and T, a decrease in free energy insures an increase in the entropy of the system. None of the above statements are true.
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