1. The problem statement, all variables and given/known data How would you use chromatography to determine whether an unknown pure liquid is 1-pentene, cis-2-pentene, or trans-2-pentene? 2. Relevant equations 3. The attempt at a solution I looked up the boiling points of the three and see that 1-pentene is lower, but the cis and trans pentene are similar. This is where I am stuck.