SOLVED

 19.1 Multiple Choice Questions 1) Which of the following statements is true? A) There is a “heat tax” for every energy transaction. B) A spontaneous reaction is always a fast reaction. C) The entropy of a system always decreases for a spontaneous process. D) Perpetual motion machines are a possibility in the near future. E) None of the above are true. 2) Identify the process that is spontaneous A) rusting of iron B) electrolysis C) photosynthesis D) water flowing uphill E) burning gasoline 3) All of the following are examples of a spontaneous process except A) a nail left outside in the rain starts to rust. B) a reaction speeding up upon the addition of a catalyst. C) a book falls off a desk and drops on the floor. D) a boulder slides down the side of a mountain. E) water freezing when the temperature drops below 0°C. 4) The ________ Law of Thermodynamics states the energy is conserved in chemical processes. A) Zero B) First C) Second D) Third E) Fourth 5) ________ is a thermodynamic function that increases with the number of energetically equivalent ways to arrange components of a system to achieve a particular state. A) Heat of reaction B) Free energy C) Entropy D) Enthalpy E) Molar equivalence 6) The ________ Law of Thermodynamics states that for any spontaneous reaction, the entropy of the universe increases. A) Zero B) First C) Second D) Third E) Fourth 7) According to the Second Law of Thermodynamics, in order for a reaction to be spontaneous which value must increase? A) ?Ssurr B) ?Ssys C) ?Suniverse D) ?Hrxn E) ?T 8) Which of the following processes have a ΔS > 0? A) CH3OH(l) → CH3OH(s) B) N2(g) + 3 H2(g) → 2 NH3(g) C) CH4(g) + H2O(g) → CO(g) + 3 H2(g) D) Na2CO3(s) + H2O(g) + CO2(g) → 2 NaHCO3(s) E) All of the above processes have a DS > 0. 9) Which of the following processes have a ΔS < 0? A) The melting of a cube of ice B) Dissolving of salt into water C) Water boiling on the stovetop D) Dry ice sublimating into carbon dioxide gas E) Condensation of water vapor into rain drops 10) Place the following in order of increasing entropy at 298 K. C2H6(g), Pb(s), Mg(s), CH4(g) A) Mg, Pb, C2H6, CH4 B) C2H6, CH4, Pb, Mg C) Pb, Mg, CH4, C2H6 D) Mg, Pb, CH4, C2H6 E) Pb, Mg, C2H6, CH4 1