Which of the following is a false statement regarding reactionspontaneity? a) A

Question

Which of the following is a false statement regarding reactionspontaneity?
a) A very exergonic reaction may not happen quickly.
b) A non-spontaneous reaction will proceed spontaneously inthe reverse direction.
c) A spontaneous reaction can occur with a large decreasein entropy.
d) A reaction is said to be spontaneous when it can proceed inbooth forward and reverse direction.
e) Statements c) and d) are false.
Thank u
a) A very exergonic reaction may not happen quickly.
b) A non-spontaneous reaction will proceed spontaneously inthe reverse direction.
c) A spontaneous reaction can occur with a large decreasein entropy.
d) A reaction is said to be spontaneous when it can proceed inbooth forward and reverse direction.
e) Statements c) and d) are false.
Thank u

Explanation / Answer

a) A very exergonicreaction may not happen quickly.(TRUE)
b) A non-spontaneousreaction will proceed spontaneously in the reversedirection.(TRUE)
c) A spontaneousreaction can occur with a large decrease in entropy.(false)
d) A reaction is said tobe spontaneous when it can proceed in booth forward and reversedirection.(false)
e) Statements c) and d)are false. (true)

a)For exergonic reactions the G value is negative,It tellsus that those reactions will occur,
the speed of the reaction cannot be judged basing on that.
b) eg       2H2 +O2 --> 2H2O is spontaneous
             2H2O --> 2 H2 + O2 isnon-spontaneous.
c) A spontaneous reaction can occur with a large increase inentropy follows the equation
                       G=H-TS
d) some unidirectional reactions are also spontaneous.

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