2._Introduction_to_Chemical_Engineering_

2_Introduction_to_C - Measurable “units” are specific values of dimensions defined by convention such as grams for mass seconds for time or

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1 January 16. ± 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…? In chemical engineering, we are dealing with “systems” that involve “processes” designed to transform raw materials into desired products. All process variables (pressure, volume, temperature, mass, length, time, heat, etc) have “units”. A “dimension” is a property that can be measured, such as length, mass, time, or temperature, or calculated by multiplying or dividing other dimensions, such as length/time (velocity), length 3 (volume).
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Unformatted text preview: Measurable “units” are specific values of dimensions defined by convention, such as grams for mass, seconds for time, or meters for length. Read Felder and Rousseau, Chapter 2. January 18 Æ We will study units and unit conversion. In engineering Measurable units In math Countable units Æ specific values of dimension 3 cm – 1 cm = 2 cm 3 cm – 1 mm = 2.9 cm 3 cm – 1 sec = “incalculable” 3 – 1 = 2 (always) 3x – 1x = 2x only when x has the same dimension / unit 3x – 1x = 2x (do not define what x is) Numerical values of two quantities may be added or subtracted only if the units are the same....
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This note was uploaded on 04/01/2008 for the course CHE 210 taught by Professor Seongkim during the Spring '08 term at Pennsylvania State University, University Park.

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