Chem 230 F08 Final_Modified - F=105 C mol-1 h=7x20-34 J s...

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F=10 5 C mol -1 h/4 π =0.5x10 -34 J s h=7x20 -34 J s SECTION I: Transition Metals, Solids, Gases, and Enthaply 1) Ionic solids are primarily held together by what kind of interactions? a. Metallic b. Covalent c. Electrostatic d. All of the above e. None of the above 2) A change from one structural isomer to another has no change in internal energy, yet has a change in deltaH=0.001 kJ mol -1 . If this conversion happens at standard conditions for one mole of isomer, what is the change in volume? a. 0.001 L b. -0.001 L c. 0 d. There is insufficient information to say 3) Which of the following gases deviates most from ideal behavior (i.e. is least ideal)? a. Ne b. O 2 c. H 2 0 d. CH 4 e. All of the above deviate the same amount 4) A container is filled with a polar gas. Which kinetic theory assumption is being violated? a. Pure gas is composed of many identical particles b. The particles have negligible volume c. The particles are moving randomly d. The gas particles only interact with each other during collisions e. All collisions are elastic f. All of the above g. None of the above 5) Calculate the standard enthalpy of reaction for the following reaction at 500K: 2 CH 3 OH (g) + 3 O 2 2 CO 2 (g) + 4 H 2 O (g) Enthalpies of Formation C (graphite) + 2 H 2 + ½ O 2 CH 3 OH H ° = -200 kJ mol -1 ½ O 2 + H 2 H 2 O H ° = -200 kJ mol -1 C (graphite) + O 2 CO 2 H ° = -400 kJ mol -1 C(graphite) + 2 H 2 CH 4 H ° = -100 kJ mol -1 1
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F=10 5 C mol -1 h/4 π =0.5x10 -34 J s h=7x20 -34 J s 6) A rigid vessel contains nitrogen and oxygen. When ultraviolet light is shined into the vessel, the two react as: 2 O 2 (g) + N 2 (g) 2 NO 2 (g) a) Immediately following the reaction, is the pressure higher, lower of the same as before the reaction, assuming the vessel temperature remains constant during the reaction? Briefly justify your answer. b) NO 2 is polar. Briefly explain what effect, if any, this would have on the pressure in the vessel, and which parameter in the van der Waals equation accounts for this behavior. c) Other than random movement (speeds and directions), what condition must be met by the
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Chem 230 F08 Final_Modified - F=105 C mol-1 h=7x20-34 J s...

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