CHE132S2004Ex01

CHE132S2004Ex01 - CHE132 Midterm 1 Form 0 CHE132 Midterm 1...

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CHE132 Midterm 1 Form 0 1 CHE132 Midterm 1 Spring 2004 Form 0 There are 20 questions. Each question is worth 5 points. The entire exam is worth 100 points. The first 16 questions are multiple choice. The last 4 questions require written answers. For full credit, show your work in the space provided for each of these questions on the answer form and write the answer in the box. Note: For questions 17 and 18, use the space provided on the FRONT of the answer form. For questions 19 and 20, use the space provided on the BACK of the answer form. Constants The Gas constant = R = 8.314 J mol -1 K -1 The molar heat capacity of water (C H2O ) is 75.291 J mol -1 K -1 . The molar mass of water is 18.02 g mol -1 The density of liquid water is 1 g/mL. 1 atm = 1.013 x 10 5 Pa. 1 cm 3 = 1 x10 -3 L = 1 x 10 -6 m 3 Equations w sys = -P ext V q surr = -q sys w surr = -w sys E sys = q sys + w sys q = nC T q cal = C cal T E = q v for a constant-volume calorimeter. H = E + P V (constant pressure) H = q p (q p is the heat flow at constant pressure). H reaction E reaction + (nRT) gases E H (for condensed phases) reaction = coeff p f (products) - coeff r f (reactants) q salt = n salt H soln q water = n water C water T q salt + q water = 0 q ice = n ice H fus S = q T /T S universe = S sys + S surr G sys = H sys - T S sys (constant temperature) H sys = q sys (constant pressure) G sys = -T S universe (constant pressure and temperature) G° = H° - T G reaction,T reaction,298K - T reaction,298K S (P 1 atm) = S - RlnP S (c 1 M) = S - Rlnc G reaction = reaction + RTlnQ
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CHE132 Midterm 1 Form 0 2 Question 1. Which one of the following is not a state function A: The height of a mountain. B: The volume of a mountain. C: The change in entropy that occurs on climbing the mountain. D: The work done climbing the mountain. E: The change in enthalpy that occurs on climbing the mountain. D Work done is not a state function. Question 2. How much energy does it take to raise the body temperature 3.0 °C for someone who
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CHE132S2004Ex01 - CHE132 Midterm 1 Form 0 CHE132 Midterm 1...

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