Steam_Table_saturated_superheated_Calculator.xlsx

	A	B	C	D	F	G
1	Steam Table Lookup Calculator — Saturated & Superheated
2	chemenggcalc.com — all data generated from IAPWS-IF97 — enter values in yellow cells

3
4	MODE A — Saturation properties by TEMPERATURE				Sanity-check anchors (IF97)
5	Parameter	Value	Unit	Notes	Point	Value
6	Temperature, T	103.00	°C	Valid 0.01 – 373.95 °C	100 °C	Psat = 101.42 kPa
7	Input check	OK	–			hg = 2675.6 kJ/kg
8	Saturation pressure, Psat	114.005	kPa	linear interpolation	1 bar (100 kPa)	Tsat = 99.61 °C
9	vf (sat. liquid)	0.001046	m³/kg	linear interpolation	25 °C	Psat = 3.170 kPa
10	vg (sat. vapor)	1.533119	m³/kg	linear interpolation	1 MPa, 300 °C	h = 3051.7 kJ/kg
11	hf	431.78	kJ/kg	linear interpolation		v = 0.25800 m³/kg
12	hfg (latent heat)	2248.44	kJ/kg	linear interpolation	Critical point	373.95 °C, 22.064 MPa
13	hg	2680.22	kJ/kg	linear interpolation		hfg = 0
14	sf	1.3405	kJ/kg·K	linear interpolation
15	sfg	5.9788	kJ/kg·K	linear interpolation
16	sg	7.3193	kJ/kg·K	linear interpolation
17
18	MODE B — Saturation properties by PRESSURE
19	Parameter	Value	Unit	Notes
20	Pressure, P (absolute)	1000.000	kPa	Valid 0.6117 – 22064 kPa
21	Input check	OK	–
22	Saturation temperature, Tsat	179.88	°C	linear interpolation in P
23	vf (sat. liquid)	0.001127	m³/kg	linear interpolation in P
24	vg (sat. vapor)	0.194471	m³/kg	linear interpolation in P
25	hf	762.64	kJ/kg	linear interpolation in P
26	hfg (latent heat)	2014.46	kJ/kg	linear interpolation in P
27	hg	2777.10	kJ/kg	linear interpolation in P
28	sf	2.1383	kJ/kg·K	linear interpolation in P
29	sfg	4.4467	kJ/kg·K	linear interpolation in P
30	sg	6.5851	kJ/kg·K	linear interpolation in P
31
32	MODE C — Two-phase mixture (T + quality x)
33	Parameter	Value	Unit	Notes
34	Temperature, T	100.00	°C
35	Quality, x	0.500	–	0 = sat. liquid, 1 = sat. vapor
36	Input check	OK	–
37	Saturation pressure, Psat	101.418	kPa	at the given T
38	Mixture specific volume, v	0.836452	m³/kg	vf + x(vg−vf)
39	Mixture enthalpy, h	1547.34	kJ/kg	hf + x·hfg
40	Mixture entropy, s	4.3306	kJ/kg·K	sf + x·sfg
41	Mixture internal energy, u	1462.50	kJ/kg	u = h − P·v
42
43	MODE D — SUPERHEATED steam (P + T)
44	Parameter	Value	Unit	Notes
45	Pressure, P (absolute)	1000.000	kPa	Valid 10 – 20000 kPa
46	Temperature, T	300.00	°C	Valid Tsat(P) – 600 °C
47	Input check	OK	–
48	Tsat at this P	179.88	°C	degree of superheat = T − Tsat
49	Specific volume, v	0.257979	m³/kg	T-linear, P-harmonic (1/P) interp
50	Enthalpy, h	3051.70	kJ/kg	bilinear interpolation
51	Entropy, s	7.1247	kJ/kg·K	T-linear, P-log interp
52	Internal energy, u	2793.72	kJ/kg	bilinear interpolation
53
54	Notes — data source & valid ranges
55	• Data source: every table value is generated directly from the IAPWS-IF97 formulation (iapws v1.5 Python reference implementation of the international standard). The critical-point row uses published IF97 critical values.
56	• Saturation (Modes A–C): 0.01 – 373.95 °C / 0.6117 – 22064 kPa. Grid: every 5 °C to 100 °C, every 10 °C above. Linear interpolation, typically within 0.1% for T-lookups.
57	• Superheated (Mode D): P = 10 – 20000 kPa, T = Tsat(P) – 600 °C, on a 25 °C × 19-pressure grid. h and u use bilinear interpolation; v interpolates linearly in 1/P and s linearly in ln(P) between pressure rows (matching their physical behavior, much more accurate than plain bilinear). Queries within one grid step of the saturation line are rejected rather than risking a bad interpolation — use the saturation modes there.
58	• Note on 100 °C: under ITS-90 / IF97, Psat(100 °C) = 101.42 kPa and Tsat(101.325 kPa) = 99.61 °C — the “100 °C = 1 atm” pairing is the older temperature scale. All pressures are absolute.
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