An Equation of State for Fluid Parahydrogen from the Triple-Point to 100 °K at Pressures to 350 Atmospheres

This equation of state may be useful for interpolation and for computations which include thermo-dynamic properties of parahydrogen. A principal advantage is that it employs only one set of 24 coefficients for all fluid states. The basic form is relatively simple. An adjustment term for the critical region leads to good agreement with published PVT data and specific heats in this especially difficult area. The forms of fitting functions were developed by systematic trial methods using least squares to find the coefficients.