CHEM 210 1nd Edition Lecture 20 Outline of Last Lecture I. Mixtures of GasesII. Dalton’s Law of Partial PressuresIII. Kinetic Molecular Theory of GasesOutline of Current Lecture IV. Energy Flow and Chemical ChangeA. ThermodynamicsCurrent LectureThermodynamics is the study of heat and its transformations. This branches off into a component called thermochemistry, which deals with heat involved with chemical and physical changes.The Fundamental Premise- When energy is transferred from one object to another, it appears as work and or heat.- We must define a system to study, everything else then becomes its surroundings.- A system is composed of particles with their own internal energies (E or U).- The system has internal energy and when change occurs, the internal energy changes as well.Energy is constant, and it is a vital part of our lives. Exothermic reactions occurs when energy is absorbed from the surroundings, resulting in a negative sign.These notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.Endothermic reactions occur when energy is given off to the surroundings, resulting in a positive
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