1. A 50.0-g sample of a metal is heated to 98.7 °C and then placed in a calorimeter containing 395.0 g of water (c = 4.18 J/g·°C) at 22.5 °C. The final temperature of the water is 24.5 °C. Which metal was used? A) Aluminum (C = 0.89 J/g·°C) B) Iron (C = 0.45 J/g·°C) C) Copper (C = 0.20 J/g·°C) D) Lead (C = 0.14 J/g·°C) E) None of these 2. One mole of a liquid is vaporized at its boiling point, 65 °C and 1.00 atm. Hvap for the liquid is 43.8 kJ/mol at 65 °C. Calculate w. A) 27.7 J B) –27.7 J C) –2.81  103 J D) 2.81  103 J E) None of these 3. Consider a process carried out on 1.00 mol of a monatomic ideal gas by the following two different pathways. The first pathway is A (3.00 atm, 20.0 L) to C (1.00 atm, 20.0 L) to D (1.00 atm, 50.0 L); and the second pathway is A (3.00 atm, 20.0 L) to B (3.00 atm, 50.0 L) to D (1.00 atm, 50.0 L). In each case, the gas is taken from state A to state D. Calculate ∆HABD. A) 225 L·atm B) –225 L·atm C) –25 L·atm D) –475 L·atm E) 25 L·atm 4. Using the following data, calculate the standard heat of formation of ICl(g) in kJ/mol. H° (kJ/mol) Cl2(g)  2Cl(g) 242.3 I2 (g)  2I(g) 151.0 ICl(g)  I(g) + Cl(g) 211.3 I2(s)  I2(g) 62.8 A) –211 kJ/mol B) –14.6 kJ/mol C) 16.8 kJ/mol D) 245 kJ/mol E) 439 kJ/mol 5. One mole of an ideal gas at 25 °C is expanded isothermally from 5.0 L to 10.0 L under such conditions that no work is produced in the surroundings. Which statement is correct? A) Sgas = 0 B) Sgas = Rln2/298 C) Suniv = 0 D) Ssurr = 0 E) Sgas = Ssurr 6. The reaction 2H2O(g)  2H2(g) + O2(g) has a positive value of G°. Which of the following statements must be true? A) The reaction is slow. B) The reaction will not occur. That is, when H2O(g) is introduced into a flask, no O2 or H2 will form even over a long period of time. C) The reaction is exothermic. D) The equilibrium lies far to the right. E) None of these is true. 7. The process H2O(g)  H2O(l) takes place at 1 atm and 95 °C. What is ΔG? A) less than zero B) equal to zero C) greater than zero D) More information is needed. 8. For which process is S negative? A) evaporation of 1 mol of CCl4(l) B) mixing 5 mL of ethanol with 25 mL of water C) compressing 1 mol of Ne at constant temperature from 0.5 atm to 1.5 atm D) raising the temperature of 100 g of Cu from 275 K to 295 K E) grinding a large crystal of KCl to powder 9. In an isothermal process, the pressure on 1 mol of an ideal monatomic gas suddenly changes from 4.00 atm to 100.0 atm at 25°C Calculate S. A) 20.5 J/K B) –20.5 J/K C) 26.8 J/K D) –26.8 J/K E) None of these