Hello, how are you?
The correct answer to this Q is E. but I have chosen B. Could you please explain why all of them cannot be true? Thank you
The following reaction has a positive value of ΔG°.
2H2O(g) → 2H2(g) + O2(g)
Which of the following statements must be true?
A. The reaction is slow.
B. The reaction will not occur. That is, when H2O(g) is introduced into a flask, no O2 or H2 will form
even over a long period of time.
C. The reaction is exothermic.
D. The equilibrium lies far to the right.
E. None of these is true.
3 answers
A. dG has nothing to do with speed of a reaction. Carbon is the more stable form of diamond but all the girls getting diamond rings today need not worry about that ring crumbling tomorrow. :-).
B. All reactions occur to some extent no matter how small. So this has an extremely small Keq, so it's small but still occurs.
C. Is the reaction exothermic. I thought the reverse reaction was exothrmic.
D. No, the eq lies far to the left; otherwise all of our lakes and rivers would have dried up long ago and we would have plenty of oxygen and hydrogen in our atmosphere.
E. That leaves E.
B. All reactions occur to some extent no matter how small. So this has an extremely small Keq, so it's small but still occurs.
C. Is the reaction exothermic. I thought the reverse reaction was exothrmic.
D. No, the eq lies far to the left; otherwise all of our lakes and rivers would have dried up long ago and we would have plenty of oxygen and hydrogen in our atmosphere.
E. That leaves E.
Thank you!
1 answer