Alkenes have melting and boiling points close to the corresponding alkanes.
![alkenes-physical-properties alquenos-propiedades-fisicas](/images/stories/organica-i/alquenos/propiedades-fisicas/alquenos-propiedades-fisicas-01.png)
Dipole moment in alkenes. In carbon $sp^2$ the electrons in the s orbital are closer to the nucleus and are strongly attracted to it, so that a carbon $sp^2$ has a tendency to attract electrons towards itself, which generates dipole moments.
![alkenes-physical-properties alquenos-propiedades-fisicas](/images/stories/organica-i/alquenos/propiedades-fisicas/alquenos-propiedades-fisicas-02.png)
In " trans " alkenes the dipole moments are subtracted, even canceling out in the event that both carbons have the same chains. In cis alkenes the dipole moments add up giving rise to a non-zero total dipole moment (polar molecule)
![alkenes-physical-properties alquenos-propiedades-fisicas](/images/stories/organica-i/alquenos/propiedades-fisicas/alquenos-propiedades-fisicas-03.png)