5_60_lecture1

# 5_60_lecture1 - MIT OpenCourseWare http://ocw.mit.edu 5.60...

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Unformatted text preview: MIT OpenCourseWare http://ocw.mit.edu 5.60 Thermodynamics & Kinetics Spring 2008 For information about citing these materials or our Terms of Use, visit: http://ocw.mit.edu/terms . 5.60 Spring 2008 Lecture #1 page 1 Thermodynamics Thermodynamics: → Describes macroscopic properties of equilibrium systems → Entirely Empirical → Built on 4 Laws and “simple” mathematics th Law ⇒ Defines Temperature (T) 1 st Law ⇒ Defines Energy (U) 2 nd Law ⇒ Defines Entropy (S) 3 rd Law ⇒ Gives Numerical Value to Entropy These laws are UNIVERSALLY VALID , they cannot be circumvented. 5.60 Spring 2008 Lecture #1 page 2 Definitions: • System : The part of the Universe that we choose to study • Surroundings : The rest of the Universe • Boundary : The surface dividing the System from the Surroundings Systems can be: • Open : Mass and Energy can transfer between the System and the Surroundings • Closed : Energy can transfer between the System and the Surroundings, but NOT mass • Isolated : Neither Mass nor Energy can transfer between the System and the Surroundings Describing systems requires: • A few macroscopic properties: p, T, V, n, m, … • Knowledge if System is Homogeneous or Heterogeneous • Knowledge if System is in Equilibrium State • Knowledge of the number of components 5.60 Spring 2008 Lecture #1 page 3 Two classes of Properties: • Extensive : Depend on the size of the system (n, m, V,…) • Intensive : Independent of the size of the system (T, p, V = V ,…)...
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## This note was uploaded on 07/31/2011 for the course CHM 170 taught by Professor Lemtayo during the Spring '11 term at MIT.

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5_60_lecture1 - MIT OpenCourseWare http://ocw.mit.edu 5.60...

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