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. The melting point of water is 0oC at 1 atm pressure because under these conditions:
DS for the process H2O(s)--> H2O(l) is positive. DS and DSsurr for the process H2O(s)--> H2O(l) are both positive. DS and DSsurr for the process H2O(s)--> H2O(l) are equal in magnitude and opposite in sign. DG is positive for the process H2O(s)--> H2O(l). None of these is correct.
4. The second law of thermodynamics states that:
the entropy of a perfect crystal is zero at 0 K. the entropy of the universe is constant the energy of the universe is increasing. the entropy of the universe is increasing. the energy of the universe is constant.
5. The maximum possible useful work obtainable from a process at a constant temperature and pressure is equal to the change in:
temperature DH DS free energy work
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