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D Question 14 1 pts A positive change in entropy represents: none of these an increase in dispersal of matter molecular disorder) a decrease in thermal energy release of thermal energy a process that cannot occur spontaneously Question 15 1 pts At 1 atm, liquid water is heated above 100°C it boils. ASsys (entropy) for this process is: O more information is needed none of these O equal to zero O greater than zero less that zero 50 $: 8 4 5 6 8 00 9 R Т. Y

U Question 16 1 pts Consider the reaction 2N,0.6) 4NO,(8) O2(8) at 25°C for which the following data are relevant ΔΗ, sº N2O5 13.30 kJ/mol 355.7J/K mol NO 33.15 kJ/mol 239,9 J/K mol 02 O kJ/mol 204.8 J/K mol Calculate AG" for the reaction at 25°C. none of these 94.7 ס O 135 kJ 29.0 kJ O 135000 kJ a D 80 SP A S 96 5 7 8 R T Y U T K

Question 17 1 pts Which of the following statements regarding spontaneous changes is false? none of these O Spontaneity is favored when the dispersal of matter is increased All exothermic reactions are spontaneous. Spontaneous changes occur at a given state without any outside influence. Spontaneity is favored when heat is released.

D Question 18 1 pts For the reaction given below. DH° = -1516 kJ at 25°C and DSC = -432.8 J/K at 25°C. This reaction is spontaneous Siha(g) + 2O2(g) -SiO2(s) + 2H2O none of these O only below a certain temperature only above a certain temperature at all temperatures O at no temperatures

D Question 19 1 pts Of the following questions, which ones are thermodynamic rather than kinetic concepts? 1. Can substances react when they are put together? II. If a reaction occurs, how fast will it occur? III. What is the mechanism by which the reaction occurs? IV. If substances react, what energy changes are associated with the reaction? O I and III II and IV O II and III O I, III, and IV O I and IV