Correction of specific heat in isobaric expansion data

Abstract

We have measured unusually high specific heats for liquid metals using the isobaric expansion apparatus at Lawrence Livermore National Laboratory. In an effort to improve the pyrometer used in the facility, the cause of this discrepancy was discovered. The properties of liquid tantalum have since been remeasured, which can be expressed by: H=0.15002+1.0164×10⁻⁴ T+2.1476×10⁻⁸ T ² V/V ₀=1.0545−3.5578×10⁻⁶ T+9.9015×10⁻⁹ T ² ϱ=1.3068−4.6420×10⁻⁵ T+1.3163×l0⁻⁸ T ² over the range 3270 K⩽T⩽7250 K, where H is enthalpy in MJ · kg⁻¹ relative to the value at 300 K and 0.1 GPa, ϱ is the resistivity in μΩ · m, and V ₀ is the specific volume at STP (6.024×10⁻⁵ m ³ · kg⁻¹).