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2011•Journal of Xinxiang UniversityRequires access

Experiment Improvement of Measuring Thermodynamic by Potentiometry Method

Feng Xiang-ming

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Abstract

A reversible Zn-AgCl cell is fabricated with Zn as cathode,Ag/AgCl as anode and ZnSO4(0.1 mol?L-1)-KCl(0.1 mol?L-1) solution as electrolyte.Taking the cell as experimental object,corresponding thermodynamic function of chemical reaction is measured.It is measured that electromotive force(EMF) and temperature coefficient of the cell reached 0.992 1 V at 25 ℃ and 7.2×10-4 V/K,respectively.The results show that the cell can significantly improve the feasibility of measuring thermodynamic function with potentiometry.

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What this paper is about

A reversible Zn-AgCl cell is fabricated with Zn as cathode,Ag/AgCl as anode and ZnSO4(0.1 mol?L-1)-KCl(0.1 mol?L-1) solution as electrolyte.Taking the cell as experimental object,corresponding thermodynamic function of chemical reaction is measured.It is measured that electromotive force(EMF) and temperature coefficient of the cell reached 0.992 1 V at 25 ℃ and 7.2×10-4 V/K,respectively.The results show that the cell can significantly improve the feasibility of measuring thermodynamic function with potentiometry.

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Available abstract

A reversible Zn-AgCl cell is fabricated with Zn as cathode,Ag/AgCl as anode and ZnSO4(0.1 mol?L-1)-KCl(0.1 mol?L-1) solution as electrolyte.Taking the cell as experimental object,corresponding thermodynamic function of chemical reaction is measured.It is measured that electromotive force(EMF) and temperature coefficient of the cell reached 0.992 1 V at 25 ℃ and 7.2×10-4 V/K,respectively.The results show that the cell can significantly improve the feasibility of measuring thermodynamic function with potentiometry.

Key concepts: Electromotive force, Electrolyte, EMF measurement, Concentration cell, Cathode, Anode, Chemistry, Thermodynamics

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