Exam_2_20.110_review_slides - 20.110 Exam 2 review Exam...

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20.110 Exam 2 review
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Exam details Who? You all taking the exam! What? 20.110 Exam 2 covering lectures °±²°$ 9 When? Thursday, two times: %!:³ ²"%!:° pm and "%!:´µ²$ 9pm Where? Walker Gym What to bring? Calculator Cheat sheet, double-sided one page ( Note%!: you can also bring last exam’s cheat sheet) Pens and/or pencils An inquisitive mind :)
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Exam taking strategies Read the problem carefully! Make sure you answer all parts of the question. Pay attention to units. Sanity check your answers at the end. Does your process and answer make physical sense? You get partial credit for recognizing your answer doesn’t make sense, even if you can’t get the right answer. When in doubt, state all assumptions you are making. When plugging in numbers, keep track of units.
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Gibbs free energy of a reaction Gibbs free energy is a state function that (at constant T, P) is the criterion for spontaneous change: ΔG = ΔH - TΔS The Gibbs free energy can be calculated for the formation of a compound, thus allowing us determine the spontaneity of a reaction from its components: Note: the Gibbs free energy also allows us to make a statement about how much energy is available to do work in the system.
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Dependence of G on T Gibbs²Helmholtz%!: Assumption: enthalpy is independent of temperature.
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