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CHEM 115 -
Heat Reactions
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Chem 115 1st Edition Lecture 16Outline of Last LectureI. Internal EnergyII. Total EnergyOutline of Current LectureI. Exothermic ReactionsII. Endothermic ReactionsIII. ConstantsIV. EnthalpyCurrent LectureExothermic Reactions- Gives off heat- Head product (-q)Endothermic Reactions- Absorbs heat- Heat reactant (+q)E = q + wWork is done by system (-w) on system (+w)CONSTANTS1 J = 1 kg X m2/s21 cal = 4.184 JThese 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.1 Btu = 1055 JEnthalpy- Chemical change at constant pressureChange in E = q + w- PV work is most common chemical work- If system remains constant, volume doesn’t
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