The self-diffusion coefficient, D, of sulphuric acid has been measured at 15.1 and 25 °C to a maximum pressure of 194 MPa using the n.m.r. steady-gradient spin–echo method. The pressure dependence of D is similar to that of methanol, (∂D/∂p)T being negative, and dissimilar to that of water, where (∂D/∂p)T passes from positive to negative values at low temperatures.
K. R. Harris, J. Chem. Soc., Faraday Trans. 1, 1982, 78, 1629 DOI: 10.1039/F19827801629
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