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Lecture 41

# Lecture 41 - Topics for the day Administrative stuff...

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Topics for the day Administrative stuff Entropy and physical change Entropy and chemical reactions Homework Quest HW5: Q10 has been changed to full marks for all Quest HW6, due next Wednesday 10 am ALEKS Objective 7, due next Friday 11:59 pm List of ALEKS topics for exam 4 on next page. Practice exam – you’ll be emailed when it’s ready. Four more lectures Two on thermodynamics, One exam review Friday next week will be course wrapup, your assessment of the class, ±nal exam discussion, and maybe some surprises. Exam stuff 1 2 3

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Exam Four is next Wednesday May 5th, 7 – 9 pm IT’S IN A DIFFERENT ROOM: GEA 105 (in syllabus) Topic is Thermodynamics: Lecture 35 up to lecture 42 (Monday). Lecture 43 will be a review. Susan’s Exam Review: Monday 4 - 5 pm, WEL 3.502 Susan will be emailing all people we have on the makeup list by Monday to confrm. Formula sheet will be supplied. You will need to know which ±ormula to use ±or which questions. Exam stu±± CH301 Exam Four Formula Sheet As discussed in class, formulas are provided without context. You don ! t have to memorize the formulas, but you need to know what situations they apply to. Formulas are sorted alphabeticaly. ! E = q – P ! V ! E = q – ! n R T ! E = q + w ! E system + ! E surroundings = ! E universe = 0 G = H – P V ! G = ! H –T ! S ! G f ˚ = 0 ! rxn = " ! G f ˚(products) – " ! G f ˚(reactants) H = E + P V ! H = ! E + ! n gas R T ! H f ˚ = 0 ! rxn = ! H a ˚ + ! H b ˚ + ! H c ˚ + . .. ! rxn = " BE (reactants) – " BE (products) ! rxn = " ! H f ˚(products) – " ! H f ˚(reactants) ! H = q = – (m soln s soln ! T + C cal ! T) q = C ! T q = C m n ! T q = s m ! T q rxn = – (m water s water ! T + C cal ! T) ! S = ! H T ! S = C P ln T f T i ! S = n R ln V f V i ! rxn = " S f ˚(prod) – " S f ˚(react) ! S sur = – q T ! S system + ! S sur oundings = ! S universe ! S univ = – ! G T w = –P ! V w = – ! n R T ! X = X final – X initial Last year’s sheet. This year’s will be similar.
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Lecture 41 - Topics for the day Administrative stuff...

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