The solubility and decomposition of ozone in solutions of sulfuric and perchloric acids in the temperature range from 25 to –70°C

Abstract

The solubility of ozone (O 3 ) in 5 M solutions of H 2 SO 4 or НСlO 4 and in 18 M H 2 SO 4 markedly increases as the temperature decreases from 25 to–70°C. In particular, the solubility coefficient of ozone (α = [Ο 3 ] liq /[Ο 3 ] gas ) in 5 M H 2 SO 4 increases in this temperature range from 0.13 to 1.47, the heat of solubility being 13.5 kJ/mol. At low temperature, the absorption band of ozone at 588 nm (ε = 4.5 L mol –1 cm –1 ) is detected. At T ≤–30°C, ozone virtually does not decompose in acid solutions.