Unformatted text preview: Chemical Engineering vs. Chemistry Seong H. Kim Department of Chemical Engineering Pennsylvania State University Two-word definition
Chemistry Studying molecules
You have learned some in high school and freshmen classes... classes... Chemical Engineering Processing chemicals
You have not learned it at all so far... far... 1 Chemist vs. Chemical Engineer
A chemist is more likely to be developing new compounds and materials. A chemical engineer is more likely to be working with existing substances. Chemistry
Organic chemistry Reactions of organic molecules Biochemistry Reactions of biomolecules Inorganic chemistry Reactions of inorganic molecules Physical chemistry Studying physical phenomena related to molecules Analytical chemistry Detecting, identifying and quantifying molecules 2 Chemical Engineering
Mass balance Control supply of materials in a system Energy balance Control supply of heat in a system Momentum balance Control fluid flow in a system Reaction rate Control conversion of materials in a system Enthalpy (H)
Energy In chemistry Heat needed for / released from conversion of molecules from one state to another (due to differences in energies stored in chemical bonds)... bonds)... E* H Reaction coordinate In chemical engineering Heat that must be supplied to / removed from a system to attain / keep certain conversion in a chemical process 3 Chemical Engineering courses
210 Material balances (mass balance) 220 Thermodynamics (energy balance) 320 Phase and chemical equilibria (mass & energy balance) 330 Process fluid mechanics (momentum balance) 350 Process heat transfer (energy balance) 410 Mass transfer operation (mass, energy, & momentum balance) 430 Chemical reaction engineering (mass & energy balance + reaction rate) Other courses polymers (441, 442), petroleum (432), biobioprocessing (340, 438, 449), mathematical modeling (360), advanced mass transfer and transport (448, 446), design (470), lab (480), and special topics (497) So what is chemical engineering?
Application of physics and mathematics to the process of converting raw materials (chemicals and biochemicals) into more useful or valuable forms. In the beginning of undergraduate chemical engineering curriculum, there is not much chemistry component, except that we are dealing with chemicals... But remember that connecting your thinking to the molecular lever always helps you to understand the chemical nature of the chemical engineering processes... This becomes more important as you advance to higher-level courses and want to go to graduate school and become a researcher... 4 ChE 210H Textbooks (08 Fall) Next class: What is the important skill required for chemical engineering? What is the difference between math in chemical engineering and math in Math 140, 141, 230, 251...? 5...
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