<p>A good idea comes from looking at the courses.</p>
<p>Core ChemE courses:
Thermodynamics
Fluid Mechanics
Heat and Mass Transfer
Separation Processes
Chemical Process Analysis
Reaction Engineering/Kinetics
Process Dynamics and Control
Process Design (Senior Design)</p>
<p>So starting from the top...thermo probably has the most (physical) chemistry you will be exposed to, but even then, you will be talking mostly about heat exchangers, mixers, nozzles, diffusers, etc.</p>
<p>Fluid mechanics has very little chemistry in it...there is some electrochemical/macromolecular aspects (ion transport, colloids, polymer rheology, etc) but that's mostly grad level.</p>
<p>Heat and Mass is really just an extension of intro thermo and separations is more an application of an intro fluids class.</p>
<p>Reaction kinetics will have some chemistry (rate laws, arrhenius, equilibrium, etc) but you will be focusing on optimizing the reaction, but not explaining why a certain pathway occurs.</p>
<p>The process design/analysis classes again don't have much chemistry. You'll mostly be working with distillation columns, packed bed reactors, heat exchangers, etc.</p>
<p>If anything, I would say chemE is almost closer to mechE than chemistry (minus the statics/dynamics classes).</p>
<p>Of course, you will still take some chem classes as part of the requirement, but notice much of the core engin courses are not very theoretical, other than thermo.</p>
<p>That being said, in grad school and academia, there is a lot of emphasis on molecular/nano engineering these days (microfluidics, nano self-assembly, switchable surfaces, molecular dynamics, etc) where a great deal of chemistry (mostly physical/quantum/electro) is involved. The core classes teach you stuff that's been around for the past 150 years, but if you're thinking about something more than simply a job at a company (starting business, academia, etc), then learning the (physical) chemistry itself is quite important.</p>