chem456_exam1key - Winter 2010 Chemistry 456 First...

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Winter 2010 Chemistry 456 First Examination January 29, 2010 Useful information and equations: Law IA: Uqw Δ=+ Law IB: (, ) VT UU T V dU dT dV TV = ∂∂ ⎛⎞ =+ ⎜⎟ ⎝⎠ H UP V Heat Capacity V V U C T = P P H C T = Work: ext wP d V =− 2 10 m/sec wm g h g wV I d t = = = Kinetic Energy: 2 2 mv ε = Isothermal Reversible work: ln f i V wn R T V PV Const = Adiabatic Reversible work: w P d V () , , ; where Pm Vm C P V Const C γ == Thermodynamic Equations of State TP HV PT Thermal expansion and compression coefficient 11 P T VV V P βκ ∂− IG EoS (and other IG relations) m PV RT = ,, CCR = + V P UCT HCT Δ Δ vdW EoS 2 m m R Ta P Vb V Cyclic rule: 1 yx z dx dz dy dy dx dz = − Calculus Rules: ( ) ( ) dy z dz zy dx dx dx dx dy dx dz dz dy = f i x y x Z Z dx x Δ= Gas Constant: 8.3 / 0.082 / 300 2.5 / 100 1 RJ m o l K R LA t mm o lK RK k J m o l JL A t m = = −− ⋅= ≈− 5 1 0 Atm bar Pa ≈= ( ) ( ) 273.15 TK TC = + The mean is often quite low on my exams. If you are having difficulty, don’t freak out. Many parts of problems can be done independently, so if you get stuck, see if you can do another section. The questions are not arranged in order of difficulty. Show your work throughout, always write down the equations you are using before substituting in numerical values and always show units for computed quantities. Show the analytical results of derivatives and integrals before substituting numbers. You do not need to compute the final number if you do not want to but show where the numbers you are given can be used. 1/6
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Winter 2010 Chemistry 456 Name _____________________________ ID_________________ This page is left blank. Use it for extra work if you need it. Please leave it attached to the rest of the exam. 2/6
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Winter 2010 Chemistry 456 1A). Working out is a great way to get in shape. Many of us try to use the workout to burn energy. This is challenging, as the following problem demonstrates. A small cup of yogurt (or an apple) contains about 300kJ of energy (or 80Cal).
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This note was uploaded on 03/03/2010 for the course CHEM 456 taught by Professor Staff during the Spring '08 term at University of Washington.

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chem456_exam1key - Winter 2010 Chemistry 456 First...

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