The enthalpy of liquid sodium to 1505 K by drop calorimetry

Abstract The enthalpy (relative to 298.15 K) of liquid sodium was measured to 1505 K, using a high-precision drop-calorimetric system. The following equation represents the enthalpy of liquid sodium in the temperature range from 554 to 1505 K: H o (T)−H o (298.15 K ={4.62436( T K )+8.4442 × 10 −4 ( T K ) 2 −5.92445×10 5 ( T K )×10 5 ( T K ) −1 +731.931} cal th mol − All temperatures are based on IPTS-68. Values of { H o ( T ) − H o (298.15 K)}, C p o ( T ), and { S o ( T ) − S o (298.15 K} are tabulated.