Doly wrote:katkinkate wrote:The trouble with reversible chemical reactions is, if you split a molecule (Z) into smaller molecules A and B, producing a certain amount of energy for use elsewhere, to recombine A and B to get back Z usually takes at least the same amount of energy that splitting them did.
Correct the "usually" and say "always". Reversible chemical reactions use the same amount of energy in one direction as they produce in the other.
Even when a catalyst is used on one side of the reaction?