Convert Kilojoules per Kilogram-Kelvin to Joules per Kilogram-Kelvin

The Kilojoule per Kilogram-Kelvin (symbol: kJ/(kg·K)) is a unit of specific entropy. A metric specific-entropy unit equal to exactly 1,000 J/(kg·K). kJ/(kg·K) is the dominant working unit in international engineering steam tables per IAPWS-IF97, refrigerant property tables (Lemmon-Span-Wagner Helmholtz EoS for R-134a, R-410A, R-1234yf, R-744 CO₂, ammonia R-717), and gas-turbine working-fluid property charts per VDI 4670. Standard saturated water entropy at 100°C: s_f = 1.3069 kJ/(kg·K); saturated steam at same point: s_g = 7.3549 kJ/(kg·K); the entropy of vaporization s_fg = 6.0480 kJ/(kg·K) — a direct measure of phase-change reversible heat per unit mass at that temperature (s_fg · T = h_fg at saturation). T-s diagrams (temperature-entropy thermodynamic cycle plots used for Rankine, Brayton, refrigeration, organic Rankine ORC cycles) universally use kJ/(kg·K) on the horizontal axis. Mollier h-s diagrams for steam likewise use kJ/(kg·K). The unit is dominant in Cycle-Tempo, EBSILON, GateCycle, Thermoflex, IPSEpro power-plant simulators.

It belongs to the metric measurement system.

Kilojoules per Kilogram-Kelvin are commonly used in turbine design, refrigeration analysis, and power plant engineering.

The Joule per Kilogram-Kelvin (symbol: J/(kg·K)) is a unit of specific entropy. The SI unit of specific entropy (entropy per unit mass) per ISO 80000-5 §5-19.1 — used in steady-flow thermodynamics where the relevant entropy quantity is normalized to the mass flow rate through a control volume (nozzles, turbines, compressors, heat exchangers). J/(kg·K) is the universal output unit for computational thermodynamics libraries: CoolProp (open-source Helmholtz-energy-based property library), NIST REFPROP (the gold-standard reference fluid property database), IAPWS-IF97 industrial-formulation steam tables, and commercial process simulators (Aspen Plus, ChemCAD, HYSYS, ProMax). Dimensionally identical to specific heat capacity c_p in J/(kg·K), but physically distinct — entropy is a state function representing energy spreading, while c_p is a heat-flow response coefficient. Reference values per IAPWS-IF97: liquid water at 25°C has s ≈ 367 J/(kg·K); steam at 200°C and 1 bar has s ≈ 7,834 J/(kg·K); R-134a saturated vapor at 25°C has s ≈ 1,718 J/(kg·K); dry air at 25°C and 1 bar has s ≈ 6,876 J/(kg·K) (relative to reference state). Used universally in CFD strong-form energy-equation post-processing (ANSYS Fluent, OpenFOAM, STAR-CCM+).

It belongs to the metric measurement system.

Joules per Kilogram-Kelvin are commonly used in turbine design, refrigeration analysis, and power plant engineering.