Ideal Gases

Ideal Gases - Gases Click to edit Master subtitle style...

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Click to edit Master subtitle style 8/1/11 Gases
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8/1/11 Physical Chemistry Application of physics to the study of chemistry Ø Develops rigorous and detailed explanations of central, unifying concepts in chemistry Ø Contains mathematical models that provide quantitative predictions . w Mathematical underpinning to concepts applied in analytical, inorganic, organic, and biochemistry Ø Includes essential concepts for studying advanced courses in chemistry
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8/1/11 Divisions of Physical Chemistry Main Problems Position of Chemical Equilibrium A + B <=> C + D Rate of Chemical Reactions - Kinetics Other special topics Approaches Top down (Traditional/Analytical/Historical Approach) Begin with things we observe in the world/laboratory Examine how those observables relate to the underlying structure of matter Traditional Approach Equilibrium Thermodynamics Chapters 1-10 Chemical Kinetics Chapters 24, 25, 26, 27 Quantum Theory/ Spectroscopy Statistical Thermodynamics Special Topics
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8/1/11 Equations of State Gases are the simplest state of matter Completely fills any container it occupies Pure gases (single component) or mixtures of components Equation of state - equation that relates the variables defining its physical properties Equation of state for gas: p = f (T,V,n) Gases (pure) Properties - four, however, three specifies system Pressure, p, force per unit area, N/m2 = Pa (pascal) Standard pressure = pø = 105 Pa = 1bar Measured by manometer (open or closed tube), p = pexternal + ρ gh » g = gravitational acceleration = 9.81 m/s-2 Mechanical equilibrium - pressure on either side of movable wall will equalize Volume, V Amount of substance (number of moles), n Temperature, T, indicates direction of flow of energy (heat) between two bodies; change results in change of physical state of object Boundaries between objects Diather mic - heat flows between bodies. Change of state occurs when bodies of different temp. brought into contact
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8/1/11 Heat Flow and Thermal Equilibrium Ther mal equilibrium - no change of state occurs when two
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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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Ideal Gases - Gases Click to edit Master subtitle style...

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