Post a New Question

Chemistry

posted by .

Under standard conditions (298 K and 1 atm), which statement is true?
a] diamond converts to graphite spontaneously
b] graphite converts to diamond spontaneously
c] none of the above

How can the spontaneity of the reaction be reversed? a] increase the temperature
b] decrease the temperature
c] none of the above

If i calculated it right i got Delta H to be -1.9 kJ/mol
Delta S to be 3.3 J/mol k
and Delta G to be -2.9 kJ/mol
does this mean that the first part was a] diamond converts to graphite spontaneously since delta G was negative?

  • Chemistry -

    Yes, that's exactly what it means. So how do diamonds hold their value? Because
    a) most people don't know that.
    b) it says nothing about the rate of the reaction. As it happens the activation energy for the reaction C(diamond) ==> C(graphite) is a large bump to get over and it takes a few million years (I didn't calculate late; it's just a number I pulled out of a hat) for diamonds to change back to graphite.

  • Chemistry -

    thank you!

  • Chemistry -

    What is the answer to the second part of the question?

  • Chemistry -

    Part 1 is A
    Part 2 is C none of the above

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. chemistry

    Diamond and graphite are both allotropes of carbon. However only graphite can be used as an electrode explain why this is so even though they are both forms of carbon?
  2. Chemistry

    Consider diamond and graphite. Which of the following is true?
  3. physical sciences

    Diamond is the hardest substance known while graphite is one of the softest. Both are made only of carbon atoms. What is the most likely reason why this is true?
  4. Chemistry/geology

    Why is graphite more stable than diamond at 25˚C and 1 atm?
  5. chemistry

    Why is graphite more stable than diamond at 25˚C and 1 atm?
  6. chemistry

    under what conditions could the decomposition of Ag2O(s) into Ag(s) and O2(g) proceed spontaneously at 298 K?
  7. Chemistry

    The reaction through which carbon changes from graphite to diamond form is represented by the equation C(graphite) ---> C(diamond) delta H: ?
  8. Chem

    The reaction through which carbon changes from graphite to diamond form is represented by the equation C(graphite) ---> C(diamond) delta H: ?
  9. Chemistry please help

    The reaction through which carbon changes from graphite to diamond form is represented by the equation C(graphite) ---> C(diamond) delta H: ?
  10. Chemistry please help!

    The reaction through which carbon changes from graphite to diamond form is represented by the equation C(graphite) ---> C(diamond) delta H: ?

More Similar Questions

Post a New Question