Энтальпия entropy

Reference data и engineering information about энтальпия entropy для thermodynamics applications.

enthalpyentropyКалькуляторТаблица данных

Overview

Enthalpy ( $H$ ) and entropy ( $S$ ) are fundamental thermodynamic properties used to analyze energy transfer and process efficiency.

Key Formulas

Enthalpy

$H = U + PV$

Total heat content of a system.

Entropy

$dS = \frac{\delta Q_{rev}}{T}$

Measure of irreversibility.

Gibbs Free Energy

$G = H - TS$

Maximum non-expansion work.

Helmholtz Free Energy

$A = U - TS$

Maximum work at constant volume.

Variables

Symbol	Description	Unit
$H$	Enthalpy	J
$U$	Internal energy	J
$P$	Pressure	Pa
$V$	Volume	m³
$S$	Entropy	J/K
$G$	Gibbs free energy	J
$T$	Temperature	K

Reference Data

18 строк

Enthalpy and entropy of steam at saturation and superheated conditions (IAPWS-IF97)
Temperature(°C)	Pressure(MPa)	Enthalpy (h)(kJ/kg)	Entropy (s)(kJ/(kg·K))	Phase
100	0.1013	2676.1	7.3549	Saturated vapor
150	0.4762	2746.6	6.8372	Saturated vapor
200	1.5549	2793.2	6.4323	Saturated vapor
250	3.9762	2803.2	6.0747	Saturated vapor
300	8.5879	2751	5.7078	Saturated vapor
350	16.529	2567.6	5.2158	Saturated vapor
374	22.064	2099.3	4.4298	Critical point
200	0.1	2875.3	7.8343	Superheated
300	0.1	3074.5	8.2158	Superheated
200	1	2827.9	6.694	Superheated
300	1	3051.2	7.1229	Superheated
400	1	3264.5	7.4651	Superheated
300	5	2924.5	6.2084	Superheated
400	5	3195.7	6.6459	Superheated
500	5	3433.8	6.9759	Superheated
400	10	3097.5	6.2141	Superheated
500	10	3375.1	6.5995	Superheated
600	10	3625.8	6.9029	Superheated

Источник: engineeringtoolbox.com

References

Original Source

Источник: engineeringtoolbox.com