110309_Quiz3_answer

110309_Quiz3_answer - Your Name Chem340 Physical Chemistry for Biochemists/10 Quiz 3 Q1 2 The figure 1(right shows the temperature dependence of

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Your Name . [ / 1 0 ] Chem340 Physical Chemistry for Biochemists Quiz 3 Mar 11, 2011 Q1, 2. The figure 1 (right) shows the temperature dependence of chemical potential for molecule X. Solid and dotted lines denote chemical potentials for 3 phases at P = P 0 and P 0 + P, respectively. Q1 . This molecule satisfies (choose one) (a) V m, Solid > V m, Gas > V m, Liquid (b) V m, Gas > V m, Liquid > V m, Solid (c) V m, liquid > V m, Gas > V m, Solid (d) V m, Gas > V m, Solid > V m, Liquid Q2. What of the following is correct when P is increased to P 0 + P from P 0 ? Choose ALL correct ones. a) Melting point is increased from T A to T B b) Melting point is decreased from T B to T A c) Boiling point is increased from T C to T D d) Boiling point is decreased from T D to T C Q3. Assume that S H 2 O , s 48.0 J mol 1 K 1 , S H 2 O , g 188.8 J mol 1 K 1 . S H 2 O , l 70.0 J mol 1 K 1 By what amount does the chemical potential of water exceed that of steam at 102.00°C? Choose the closest. (a) 200 Jmol -1 (b) -200 Jmol -1 (c) 100 Jmol -1 (d) -100 Jmol -1 (e) 50 Jmol -1 (f) -50 Jmol -1 Q4 From the following data at 298.15 K and 1 bar, choose the closest value to the standard formation enthalpy for CO 2 (g). Reactions Reaction enthalpy (kJmol -1 ) Fe 2 O 3 ( s ) + 3C( graphite ) 2Fe( s ) + 3CO( g ) 493 FeO( s ) + C( graphite ) Fe( s ) + CO( g ) 156 CO 2 ( g ) CO( g ) + 1/2O 2 ( g ) 283 Fe(s)+ 1/2O 2 (g) FeO(s) -266 (a) -800 kJmol -1 (b) -400 kJmol -1 (c) -200 kJmol -1 (d) -100 kJ mol -1 (e) 0 kJmol -1 Q5.
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This note was uploaded on 08/23/2011 for the course CHEM 342 taught by Professor Prestonsnee during the Spring '08 term at Ill. Chicago.

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110309_Quiz3_answer - Your Name Chem340 Physical Chemistry for Biochemists/10 Quiz 3 Q1 2 The figure 1(right shows the temperature dependence of

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