2. 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
3. For the gas sample B, this reaction is endothermic: B-->2B. The reaction is:
always spontaneous only at high temperatures only at low temperatures never spontaneous none of the above
4. In which case MUST a reaction be spontaneous, independent of T?
DH = 0, DS must be positive. DH = 0, DS is negative. DS = 0, DH is positive. DH is negative, DS is positive. None of these
5. 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
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