1972 Ap Chemistry Free |verified| Response Answers (360p)

“A voltaic cell is constructed with a Zn²⁺(0.10 M)/Zn electrode and a Cu²⁺(1.0 M)/Cu electrode. Standard reduction potentials: Cu²⁺ + 2e⁻ → Cu, E° = +0.34 V; Zn²⁺ + 2e⁻ → Zn, E° = –0.76 V. (a) Write the cell reaction. (b) Calculate E°cell. (c) Calculate Ecell at 298 K.”

ΔH° = [6ΔH_f°(CO₂) + 6ΔH_f°(H₂O)] – [ΔH_f°(glucose) + 6ΔH_f°(O₂)] ΔH° = [6(–393.5) + 6(–285.8)] – [–1274.5 + 6(0)] = [–2361.0 + (–1714.8)] – [–1274.5] = (–4075.8) + 1274.5 = –2801.3 kJ 1972 ap chemistry free response answers

, students had to convert Celsius to Kelvin and torr/mmHg to atmospheres accurately. “A voltaic cell is constructed with a Zn²⁺(0

“Given at 298 K: