Acoustic determination of thermophysical properties and critical parameters for the mixture (51 wt % R143a + 49 wt % R125) and critical line of xCO 2 + (1 - X)(51 wt % R143a + 49 wt % R125)

1. Esperança, J.M.S.S.
2. Pires, P.F.
3. Guedes, H.J.R.
4. Ribeiro, N.
5. Costa, T.
6. Aguiar-Ricardo, A.