chapter 12 - Title Chapter 12 Started September 5 2010 7:30...

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Title: Chapter 12 Started: September 5, 2010 7:30 PM Submitted: September 5, 2010 7:30 PM Time spent: 00:00:44 Total score: 1/7 = 14.2857% Total score adjusted by 0.0 Maximum possible score: 7 1. Phase Change Properties 6 Match the phase change with the event. a. melting (fusion) b. sublimation c. condensation d. crystallization (freezing) e. evaporization f. deposition Molten iron from a blast furnace is cast into ingots (“pigs”). Enter only the letter of your choice. Student Response Value Correct Answer 1. a 0% Score: 0/1 2. IMF General 2 As intermolecular forces increase, which of the following does not increase? Student Response Value A.vapor pressure B.heat of vaporization 0%
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Student Response Value C.critical temperature D.none of these E.boiling point Score: 0/1 3. Phase Change enthalpies 13 What is the heat change in J associated with 85 g of solid ethanol at -125 o C changing to gas at 103 o C? c(ethanol) (g) = 1.22 J/(g.K) c(ethanol) (liq) = 2.44 J/(g.K) c(ethanol) (s) = 1.89 J/ (g.K) ΔH fus (ethanol) = 5.01 kJ/mol ΔH vap (ethanol) = 38.6 kJ/mol
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