2. For a reaction, the DS = -30J/K and DH=25kJ. Is this reaction spontaneous at STP?
no yes need more info only at high pressures only at low pressures
3. 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
4. Which of the following favors a negative DG?
increasing energy and increasing entropy lowering energy and increasing entropy increasing energy and decreasing entropy lowering energy and decreasing entropy none of the above
5. The 3rd Law of Thermodynamics States that:
Energy is artificial Energy can neither be created nor lost The entropy of the universe is decreasing The entropy is zero at zero K for a perfect crystal none of the above
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