[a confused chiral girl]

Hi,

I am wondering which one is the most exothermic and which one is the least exothermic. I know that the least stable alkene would undergo the most exothermic hydrogenation, and the most stable alkene will undergo the least exothermic reaction. So, I know that #1 is the most exothermic because it is least stable since it is attached to a primary carbon.

I have trouble determining whether #2 or #2 is more exothermic.

thank you!

[Yggdrasil]

Because of sterics, cis-alkenes are slightly less stable than trans-alkenes.