Exam 1 KEY

Exam 1 KEY - NAME _KEY_ Computer #_ CHEMISTRY 124 EXAM 1...

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NAME ______ KEY ____________ Computer #________ CHEMISTRY 124 EXAM 1 Russak 22 January 2010 5 pages – 22 questions. DO NOT OPEN UNTIL INSTRUCTED TO DO SO Read all instructions clearly Pay attention to the point value of questions and plan your time accordingly. If you are not sure how to answer a question, move on to another one and come back later if you have time. Show all work on problems and make sure your work and final answer are clear. Use the backs of the sheets, or scratch paper to make notes. Only non-programmable calculators are permitted. CHEATING IN ANY FORM WILL NOT BE TOLERATED Good luck!
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1–8: Multiple Choice Questions (3 pts each): Circle the correct answer. 1. Which is not a state function? (a) Enthalpy (b) Work (c) Temperature (d) Pressure 2. A reaction in a piston gives off heat, and causes the piston to expand in volume. The signs of heat and work are: (a) q (–); w (–) (b) q (+); w (–) (c) q (–); w (+) (d) q (+); w (+) 3. What must be true about this process: H 2 O ( l ) H 2 O ( g ) ? (a) Δ H < 0, Δ S < 0 (b) Δ H < 0, Δ S > 0 (c) Δ H > 0, Δ S < 0 (d) Δ H > 0, Δ S > 0 4. Which equation represents the formation reaction for SO 2 ( g ) ( i.e. H 0 rxn = H 0 f )? (a) SO 3 ( g ) SO 2 ( g ) + ½ O 2 ( g ) (b) SO 2 ( g ) S ( s ) + 2 O ( g ) (c) S ( s ) + 2 O ( g ) SO 2 ( g ) (d) S ( s ) + O 2 ( g ) SO 2 ( g ) 5. Which would you expect to have the highest entropy? (a)
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Exam 1 KEY - NAME _KEY_ Computer #_ CHEMISTRY 124 EXAM 1...

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