Sulphur isotope exchange between sulphur dioxide and hydrogen sulphide

Computer Science

Scientific paper

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Scientific paper

The variation with absolute temperature, T , of the sulphur isotope equilibrium constant, K , between sulphur dioxide and hydrogen sulphide has been measured and the results compared with theoretical calculations. In the temperature range 800°K to 1300°K the experimentally measured variation is ( K - 1) = (4540/ T 2 ) - 0.0003, while the theoretically calculated variation is ( K - 1) = (3650/ T 2 ). These two estimates do not quite overlap within the assigned limits of error but theory and experiment agree to within 1%. in the temperature range studied. Thus geochemical calculations involving this exchange reaction may be performed with confidence using either estimate for the isotope equilibrium constant.

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