What are the benefits of fractional distillation over simple distillation?

To find the enthalpy of a reaction in the lab, you measured the of the reactants and the change during the reaction.

In vapor-liquid equilibrium in a binary mixture, both components are generally present in both phases. how many degrees of freedom are there for such a system? the reaction between nitrogen and hydrogen to form ammonia occurs in the gas phase. how many degrees of freedom are there for this system? steam and coal react at high temperatures to form hydrogen, carbon monoxide, carbon dioxide, and methane. the following reactions have been suggested as being involved in the chemical transformation:

Draw a line graph showing the relationship between temperature in kelvin as a function of kinetic energy.