Greetings Engineers & Scientists. This is my first post. I'm an accountant so excuse my ignorance. See diagram attached. I want to calculate how much volume expansion there would be if we vapourised n-pentane. I did this experiment with air (on a smaller scale) but there was not much expansion - maybe 30%. I was hoping I might do better with a phase change working fluid such as n-Pentane. The temperature delta would be say 25c to 70c. Also I'd like to know if the carnot efficiency of this arrangement could be worked out. Are there any problems with this type of arrangement? I assume that n-Pentane will be lighter than water & will not mix. Cheers, Lee.