We know that the lower the energy gap between bonding and antibonding orbital the easier it is to break the bond making it unstable. However, in a conjugated double bond, the overlapping of wavefunctions cause the energy gap between the bonding and antibonding orbital go down. Then why conjugated double bonded molecules are more stable?? I aint sure whether this should go to chemistry part of the forum or it is fine to post here. so sorry in advance if this is in wrong part.