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Clicker Question A stable diatomic molecule spontaneously forms from its atoms at constant pressure and temperature. How does temperature affect the reaction? a) An increase in temperature makes the reaction more favorable. b) An increase in temperature makes the reaction less favorable. c) We cannot tell from the information given. d) I do not know.

Clicker Question Given the following enthalpies of formation, determine the enthalpy of vaporization of methanol (CH3OH): CH3OH(l)  CH3OH(g) ΔHf° (kJ/mol) –239 –201   a) 38 kJ/mol b) –38 kJ/mol c) 440 kJ/mol d) –440 kJ/mol e) I do not know.

Clicker Question Given the following absolute entropies, determine the value of ΔS° for methanol (CH3OH): CH3OH(l)  CH3OH(g) S° (J/Kmol) 127 240   a) –113 J/Kmol b) 113 J/Kmol c) –367 J/Kmol d) 367 J/Kmol e) I do not know.

Clicker Question The molar enthalpy of fusion of water is 6.02 kJ at 0°C. If S° of ice is 41.3 J/molK at 0°C determine S° of liquid water at 0°C.   a) 19.2 J/molK d) 61.5 J/molK b) 21.1 J/molK e) 63.4 J/molK c) 22.1 J/molK