And in fact, the more negative this value is, the more stable our product is. So let's list a few isomers of hexine. So here's list of five different isomers of hexine and each corresponding change in enthalpy of formation. So for example, for this isomer of hexane, we have negative ten kilo cals per mole of change in enthalpy of formation. And we see that as we go from one to five, our values become more and more negative. And five is the most stable isomer and one is the least stabilizomer.