1972 Ap Chemistry Free Response Answers 🆕 Reliable

[ [H^+] = \sqrt(0.100)(1.8 \times 10^-5) ] [ [H^+] = \sqrt1.8 \times 10^-6 ]

ΔH°f (C2H5OH, l) = -277.4 kJ/mol

(to get 3H2 on left). [ 3H2 + 1.5O2 → 3H2O \quad ΔH = -857.4 , \textkJ ] 1972 ap chemistry free response answers

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(since we want ethanol as product, not reactant). [ 2CO2 + 3H2O → C2H5OH + 3O2 \quad ΔH = +1367 , \textkJ ] [ [H^+] = \sqrt(0

pH = 2.87

[ E_cell = 1.10 - \frac0.05922 \log(100) ] [ \frac0.05922 = 0.0296 ] [ \log(100) = 2 ] [ E_cell = 1.10 - (0.0296 \times 2) = 1.10 - 0.0592 ] [ E_cell = 1.0408 , \textV ] (since we want ethanol as product, not reactant)

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