question archive Under standard conditions (298 K and 1 atm), which statement is true? diamond converts to graphite spontaneously graphite converts to diamond spontaneously none of the above How can the spontaneity of the reaction be reversed? increase the temperature decrease the temperature none of the above
Under standard conditions (298 K and 1 atm), which statement is true? diamond converts to graphite spontaneously graphite converts to diamond spontaneously none of the above How can the spontaneity of the reaction be reversed? increase the temperature decrease the temperature none of the above
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Under standard conditions (298 K and 1 atm), which statement is true? diamond converts to graphite spontaneously graphite converts to diamond spontaneously none of the above How can the spontaneity of the reaction be reversed? increase the temperature decrease the temperature none of the above
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Reaction: C(diamond) -> C(graphite)
For this reaction, delta H is -1.9 kJ and delta S is 3.3 J/K. What matters is the signs of these values. Since H is negative and S is positive, the reaction of diamond converting to graphite is spontaneous at all temperatures.
Diamond converts to graphite spontaneously, and changing the temperature has no effect on the spontenaity.
Therefore, the answer is A, C.
