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S10E2A-AK

# S10E2A-AK - Multiple Choice(out of 85#16(out of 15...

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1. In Appendix C of Ebbing, in the column headed S o (J/mol K), the entry for Pb(s) is 64.78. Which one statement is completely correct? All the statements refer to 25 o C. A) Pb(s) has an absolute entropy change, ΔS o , of 64.78. B) The standard enthalpy of formation of Pb(s) is 64.78 kJ/mol K. C) The entropy of formation of Pb(s) is 64.78 J/mol K. D) The standard absolute entropy of Pb(s) is 64.78 J/mol K. E) The value is a misprint: all elements in their standard states have an S o value of zero. 2. HF is a weak acid. For the process: HF(aq) + H 2 O H 3 O + (aq) + F - (aq), ΔH o = -12.5kJ and ΔS o = -103 J/mol K. Calculate ΔG o in kJ for this process at 25 o C.
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