Part 1 For the questions below, indicate a single correct answer in the box ( 2 marks each). (a) The thermodynamic measure of disorder is: (i) work (ii) enthalpy (iii) free energy (iv) entropy (b) For the process H2O(l)H2O(g) at 100C and 1 atm, the sign of the entropy change is: (i) positive (ii) cannot be determined from the given information (iii) zero (iv) negative (c) If a reaction for which Hr=+100kJmol1 and Sr=+100JK1mol1 takes place at 100 K, what is the entropy change of the surroundings in JK1mol1 ? (i) 100 (ii) +1000 (iii) 1000 (iv) +100 (d) "As a system approaches absolute zero temperature (0K), all processes cease and the entropy (disorder) of the system approaches a minimum value," This description refers to which law of thermodynamics? (i) first (ii) second (iii) third (iv) zeroth (e) Which mathematical equation is used to calculate the entropy change when there is an expansion? (i) Ssystem=qp/T=Hsysten/T (ii) Ssysem=Cpnln(T2/T1) (iii) Ssurroundings=Hsystem/T (iv) Ssys=nRln(VdVi) PART II Calculate entropy change of the system if 1kg of water at 30C is heated to 120C at 1atm pressure, given Hvap=40.65kJmol1. Assume c (H2O(I))=4.184J1K1 within this temperature range. (7 marks) PART III For the reaction, N2O4(g)=2NO2(g), use the data below to calculate G at 298K, and comment on the spontaneity of the reaction. (5 marks) PART IV For the dissociation of water, H2O(I)=H(aq)+OH(aq),Kw at 298K is 1.0071014 whereas at Kw at 303K=1.461014. Comment on whether the process in exothermic or endothermic, using Le Chatelier's Principle