N4 [i n5 nj12

with 0 and i defined for Eq. (5) and the coefficients n-$ to n5 listed in Table 1. Equations (5) and (6) cover the range from 623.15 K at a pressure of 16.5292 MPa to 863.15 K at 100 MPa.

Table 1. Numerical values of the coefficients of the B23-equation, Eqs. (5) and (6), for defining the boundary between regions 2 and 3

1 0.348 051 856 289 69 x 103 4 0.572 544 598 627 46 x 103

2 - 0.116 718 598 799 75 x 101 5 0.139 188 397 788 70 x 102

For computer-program verification, Eqs. (5) and (6) must meet the following T-p point: T = 0.623 150 000 x 103 K , p = 0.165 291 643 x 102 MPa.

0 0

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