Jednačina stanja je jednačina koja preko pritiska, temperature i zapremine opisuje ponašanje gasa i izražava se u obliku ${\displaystyle {\ f(p,V,T)=0}.}$

• Jednačina stanja idealnog gasa: ${\displaystyle {\ pV=nRT}.}$
• Jednačina stanja Van der Valsovog gasa: ${\displaystyle {\left(p+{\frac {a}{V_{m}^{2))}\right)\left(V_{m}-b\right)=RT))$
• Redlih-Kvongova (Redlich-Kwong) jednačina stanja: ${\displaystyle {p={\frac {R\,T}{V_{m}-b))-{\frac {a}((\sqrt {T))\,V_{m}\left(V_{m}+b\right)))))$
• Soaova modifikacija Redlih-Kvongove jednačine stanja: ${\displaystyle p={\frac {R\,T}{V_{m}-b))-{\frac {a\,\alpha }{V_{m}\left(V_{m}+b\right)))}$
• Peng-Robinsonova jednačina stanja: ${\displaystyle p={\frac {R\,T}{V_{m}-b))-{\frac {a\,\alpha }{V_{m}^{2}+2bV_{m}-b^{2))))$
• Peng-Robinson-Strajek-Vera (Peng-Robinson-Stryjek-Vera) jednačina stanja: ${\displaystyle \kappa =\kappa _{0}+\left[\kappa _{1}+\kappa _{2}\left(\kappa _{3}-T_{r}\right)\left(1-T_{r}^{0.5}\right)\right]\left(1+T_{r}^{0.5}\right)\left(0.7-T_{r}\right)}$
• Eliot-Sureš-Donohova (Elliott, Suresh, Donohue) jednačina stanja: ${\displaystyle {\frac {pV_{m)){RT))=Z=1+Z^{\rm {rep))+Z^{\rm {att))}$
• Dietrići (Dieterici) jednačina stanja: ${\displaystyle \ p(V-b)=RTe^{-a/RTV))$
• Virialova jednačina stanja: ${\displaystyle {\frac {pV_{m)){RT))=1+{\frac {B}{V_{m))}+{\frac {C}{V_{m}^{2))}+{\frac {D}{V_{m}^{3))}+\dots }$
• Benedikt-Veb-Rubinova jednačina stanja: ${\displaystyle p=\rho RT+\left(B_{0}RT-A_{0}-{\frac {C_{0)){T^{2))}+{\frac {D_{0)){T^{3))}-{\frac {E_{0)){T^{4))}\right)\rho ^{2}+\left(bRT-a-{\frac {d}{T))\right)\rho ^{3}+\alpha \left(a+{\frac {d}{T))\right)\rho ^{6}+{\frac {c\rho ^{3)){T^{2))}\left(1+\gamma \rho ^{2}\right)\exp \left(-\gamma \rho ^{2}\right)}$

• Jednačina stanja idealnog gasa
• Jednačina stanja realnog gasa
• Jednačina stanja Van der Valsovog gasa

• Elliot & Lira, (1999). Introductory Chemical Engineering Thermodynamics, Prentice Hall.