84 episodes

General Chemistry Spring 2009

General Chemistry Spring 2009 John Gelder

    • Science

General Chemistry Spring 2009

    • video
    Lecture January 13, 2009

    Lecture January 13, 2009

    The majority of this class dwelled on administrative details of CHEM 1515 SPRING 2009 and the course web site. During the last 15 minutes of class we started discussing Chapter 20: Thermodynamics 2nd and 3rd Law.

    • video
    Lecture January 15, 2009

    Lecture January 15, 2009

    In today's class we talked about enthalpy and looked at the DCI on Enthalpy and the First Law. We reviewed how to calculate the enthalpy change of a chemical reaction and discussed endothermic and exothermic reactions. We defined spontaneity and considered whether enthalpy was sufficient to predict whether a chemical reaction is spontaneous. We found that we needed to also consider entropy, so we introduced entropy and discussed the 2nd and third laws of thermodynamics. We discussed how to calculate the change in entropy for a chemical reaction.

    • video
    Lecture January 20, 2009

    Lecture January 20, 2009

    In today's class we talked further about entropy and free energy and how to calculate the values.

    • video
    Lecture January 22, 2009

    Lecture January 22, 2009

    In today's class we discussed intramolecular (ionic bonds and covalent bonds) and intermolecular attractive forces (hydrogen-bonding, dipole-dipole and London dispersion forces).

    • video
    Lecture January 29, 2009

    Lecture January 29, 2009

    In today's class we discussed polarizibility and its importaqnce in dispersion forces. We then turned to vapor pressure, its definition, a particulate animation depicting vapor pressure, the comparison of vapor pressure and pressure due to vapor, and the temperature dependence of vapor pressure in the Clausius-Clapeyron equation.

    • video
    Lecture February 3, 2009

    Lecture February 3, 2009

    In today's class we began discussing the types of solid and then we looked at simple cubic. We discussed the relationship between edge length and atomic radius and we did a sample problem using simple cubic cells.

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