A methane and ethane mixture (B 12) would than have a B factor that is the square-root of the product of B 1 times B 2 (Equation 4) or -108.11. Experimental datum is -111.86, which is close enough ...

A 10.0 MPa range transducer, with an accuracy of ±0.04% of full scale, was used to measure the pressure. Methane compressibility was determined using a linear interpolation between tabulated ...