2. Which statement is FALSE?
DS increases as pressure decreases for an ideal gas, enthalpy is not pressure-dependent the lowest value of free energy occurs at equilibrium DS increases as volume increases all statements are true
3. 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
4. Rubidium has a heat of vaporization of 69.0 kJ/mol at its boiling point (686oC). For the process Rb(l)-->Rb(g) at 1 atm and 686oC. Calculate the value of DSsurroundings.
0 69.0 kJ/mol 71.9 J/K mol 61.0 kJ/mol -71.9 J/K mol
5. If an endorthermic reaction is spontaneous at 298 K, which of the following must be true for the reaction?
DG is greater than zero DG is greater than zero DG and DH are greater than zero DH and DS are greater than zero DG, DH, DS are all greater than zero
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