diff --git a/include/cantera/thermo/PDSS.h b/include/cantera/thermo/PDSS.h
index 4bb201521..4b7509f72 100644
--- a/include/cantera/thermo/PDSS.h
+++ b/include/cantera/thermo/PDSS.h
@@ -536,6 +536,18 @@ public:
     virtual doublereal gibbs_mole() const;
     virtual doublereal cp_mole() const;
 
+    virtual double enthalpy_RT_ref() const;
+    virtual double entropy_R_ref() const;
+    virtual double gibbs_RT_ref() const;
+    virtual double cp_R_ref() const;
+    virtual double molarVolume_ref() const;
+    virtual double enthalpy_RT() const;
+    virtual double entropy_R() const;
+    virtual double gibbs_RT() const;
+    virtual double cp_R() const;
+    virtual double molarVolume() const;
+    virtual double density() const;
+
 protected:
     double m_h0_RT; //!< Reference state enthalpy divided by RT
     double m_cp0_R; //!< Reference state heat capacity divided by R
diff --git a/include/cantera/thermo/PDSS_ConstVol.h b/include/cantera/thermo/PDSS_ConstVol.h
index 0f6409206..cce3dd393 100644
--- a/include/cantera/thermo/PDSS_ConstVol.h
+++ b/include/cantera/thermo/PDSS_ConstVol.h
@@ -53,24 +53,8 @@ public:
     //! @{
 
     // See PDSS.h for documentation of functions overridden from Class PDSS
-    virtual doublereal enthalpy_RT() const;
     virtual doublereal intEnergy_mole() const;
-    virtual doublereal entropy_R() const;
-    virtual doublereal gibbs_RT() const;
-    virtual doublereal cp_R() const;
     virtual doublereal cv_mole() const;
-    virtual doublereal molarVolume() const;
-    virtual doublereal density() const;
-
-    //! @}
-    //! @name Properties of the Reference State of the Species in the Solution
-    //! @{
-
-    virtual doublereal gibbs_RT_ref() const;
-    virtual doublereal enthalpy_RT_ref() const;
-    virtual doublereal entropy_R_ref() const;
-    virtual doublereal cp_R_ref() const;
-    virtual doublereal molarVolume_ref() const;
 
     //! @}
     //! @name Mechanical Equation of State Properties
diff --git a/include/cantera/thermo/PDSS_IdealGas.h b/include/cantera/thermo/PDSS_IdealGas.h
index d85d618bb..e8e6d98a0 100644
--- a/include/cantera/thermo/PDSS_IdealGas.h
+++ b/include/cantera/thermo/PDSS_IdealGas.h
@@ -55,24 +55,8 @@ public:
 
     // See PDSS.h for documentation of functions overridden from Class PDSS
 
-    virtual doublereal enthalpy_RT() const;
     virtual doublereal intEnergy_mole() const;
-    virtual doublereal entropy_R() const;
-    virtual doublereal gibbs_RT() const;
-    virtual doublereal cp_R() const;
     virtual doublereal cv_mole() const;
-    virtual doublereal molarVolume() const;
-    virtual doublereal density() const;
-
-    //! @}
-    //! @name Properties of the Reference State of the Species in the Solution
-    //! @{
-
-    virtual doublereal gibbs_RT_ref() const;
-    virtual doublereal enthalpy_RT_ref() const;
-    virtual doublereal entropy_R_ref() const;
-    virtual doublereal cp_R_ref() const;
-    virtual doublereal molarVolume_ref() const;
 
     //! @}
     //! @name Mechanical Equation of State Properties
@@ -81,7 +65,6 @@ public:
     virtual doublereal pressure() const;
     virtual void setPressure(doublereal pres);
     virtual void setTemperature(doublereal temp);
-    virtual doublereal temperature() const;
     virtual void setState_TP(doublereal temp, doublereal pres);
     virtual void setState_TR(doublereal temp, doublereal rho);
 
diff --git a/include/cantera/thermo/PDSS_SSVol.h b/include/cantera/thermo/PDSS_SSVol.h
index 9efd00b5f..354eeda10 100644
--- a/include/cantera/thermo/PDSS_SSVol.h
+++ b/include/cantera/thermo/PDSS_SSVol.h
@@ -194,25 +194,10 @@ public:
 
     // See PDSS.h for documentation of functions overridden from Class PDSS
 
-    virtual doublereal enthalpy_RT() const;
     virtual doublereal intEnergy_mole() const;
-    virtual doublereal entropy_R() const;
-    virtual doublereal gibbs_RT() const;
-    virtual doublereal cp_R() const;
     virtual doublereal cv_mole() const;
-    virtual doublereal molarVolume() const;
-    virtual doublereal density() const;
 
     //! @}
-    //! @name Properties of the Reference State of the Species in the Solution
-    //! @{
-
-    virtual doublereal gibbs_RT_ref() const;
-    virtual doublereal enthalpy_RT_ref() const;
-    virtual doublereal entropy_R_ref() const;
-    virtual doublereal cp_R_ref() const;
-    virtual doublereal molarVolume_ref() const;
-    //! @}
 
 private:
     //! Does the internal calculation of the volume
diff --git a/src/thermo/PDSS.cpp b/src/thermo/PDSS.cpp
index c8680bb9f..f077c76b9 100644
--- a/src/thermo/PDSS.cpp
+++ b/src/thermo/PDSS.cpp
@@ -294,4 +294,59 @@ doublereal PDSS_Nondimensional::cp_mole() const
     return cp_R() * GasConstant;
 }
 
+double PDSS_Nondimensional::gibbs_RT_ref() const
+{
+    return m_g0_RT;
+}
+
+double PDSS_Nondimensional::enthalpy_RT_ref() const
+{
+    return m_h0_RT;
+}
+
+double PDSS_Nondimensional::entropy_R_ref() const
+{
+    return m_s0_R;
+}
+
+double PDSS_Nondimensional::cp_R_ref() const
+{
+    return m_cp0_R;
+}
+
+double PDSS_Nondimensional::molarVolume_ref() const
+{
+    return m_V0;
+}
+
+double PDSS_Nondimensional::enthalpy_RT() const
+{
+    return m_hss_RT;
+}
+
+double PDSS_Nondimensional::entropy_R() const
+{
+    return m_sss_R;
+}
+
+double PDSS_Nondimensional::gibbs_RT() const
+{
+    return m_gss_RT;
+}
+
+double PDSS_Nondimensional::cp_R() const
+{
+    return m_cpss_R;
+}
+
+double PDSS_Nondimensional::molarVolume() const
+{
+    return m_Vss;
+}
+
+double PDSS_Nondimensional::density() const
+{
+    return m_mw / m_Vss;
+}
+
 }
diff --git a/src/thermo/PDSS_ConstVol.cpp b/src/thermo/PDSS_ConstVol.cpp
index 7896bf35f..ccaf0fb6e 100644
--- a/src/thermo/PDSS_ConstVol.cpp
+++ b/src/thermo/PDSS_ConstVol.cpp
@@ -70,72 +70,17 @@ void PDSS_ConstVol::initThermo()
     m_Vss = m_constMolarVolume;
 }
 
-doublereal PDSS_ConstVol::enthalpy_RT() const
-{
-    return m_hss_RT;
-}
-
 doublereal PDSS_ConstVol::intEnergy_mole() const
 {
     doublereal pV = (m_pres * m_Vss);
     return m_h0_RT * GasConstant * m_temp - pV;
 }
 
-doublereal PDSS_ConstVol::entropy_R() const
-{
-    return m_sss_R;
-}
-
-doublereal PDSS_ConstVol::gibbs_RT() const
-{
-    return m_gss_RT;
-}
-
-doublereal PDSS_ConstVol::cp_R() const
-{
-    return m_cpss_R;
-}
-
 doublereal PDSS_ConstVol::cv_mole() const
 {
     return (cp_mole() - m_V0);
 }
 
-doublereal PDSS_ConstVol::molarVolume() const
-{
-    return m_Vss;
-}
-
-doublereal PDSS_ConstVol::density() const
-{
-    return m_mw / m_Vss;
-}
-
-doublereal PDSS_ConstVol::gibbs_RT_ref() const
-{
-    return m_g0_RT;
-}
-
-doublereal PDSS_ConstVol::enthalpy_RT_ref() const
-{
-    return m_h0_RT;
-}
-
-doublereal PDSS_ConstVol::entropy_R_ref() const
-{
-    return m_s0_R;
-}
-
-doublereal PDSS_ConstVol::cp_R_ref() const
-{
-    return m_cp0_R;
-}
-
-doublereal PDSS_ConstVol::molarVolume_ref() const
-{
-    return m_V0;
-}
-
 void PDSS_ConstVol::setPressure(doublereal p)
 {
     m_pres = p;
diff --git a/src/thermo/PDSS_IdealGas.cpp b/src/thermo/PDSS_IdealGas.cpp
index 1f16cb53b..0311f8ffe 100644
--- a/src/thermo/PDSS_IdealGas.cpp
+++ b/src/thermo/PDSS_IdealGas.cpp
@@ -43,71 +43,16 @@ void PDSS_IdealGas::initThermo()
     m_maxTemp = m_spthermo->maxTemp(m_spindex);
 }
 
-doublereal PDSS_IdealGas::enthalpy_RT() const
-{
-    return m_h0_RT;
-}
-
 doublereal PDSS_IdealGas::intEnergy_mole() const
 {
     return (m_h0_RT - 1.0) * GasConstant * m_temp;
 }
 
-doublereal PDSS_IdealGas::entropy_R() const
-{
-    return m_s0_R - log(m_pres/m_p0);
-}
-
-doublereal PDSS_IdealGas::gibbs_RT() const
-{
-    return m_g0_RT + log(m_pres/m_p0);
-}
-
-doublereal PDSS_IdealGas::cp_R() const
-{
-    return m_cp0_R;
-}
-
-doublereal PDSS_IdealGas::molarVolume() const
-{
-    return GasConstant * m_temp / m_pres;
-}
-
-doublereal PDSS_IdealGas::density() const
-{
-    return m_pres * m_mw / (GasConstant * m_temp);
-}
-
 doublereal PDSS_IdealGas::cv_mole() const
 {
     return cp_mole() - GasConstant;
 }
 
-doublereal PDSS_IdealGas::gibbs_RT_ref() const
-{
-    return m_g0_RT;
-}
-
-doublereal PDSS_IdealGas::enthalpy_RT_ref() const
-{
-    return m_h0_RT;
-}
-
-doublereal PDSS_IdealGas::entropy_R_ref() const
-{
-    return m_s0_R;
-}
-
-doublereal PDSS_IdealGas::cp_R_ref() const
-{
-    return cp_R();
-}
-
-doublereal PDSS_IdealGas::molarVolume_ref() const
-{
-    return GasConstant * m_temp / m_p0;
-}
-
 doublereal PDSS_IdealGas::pressure() const
 {
     throw CanteraError("PDSS_IdealGas::pressure()", "unimplemented");
@@ -120,11 +65,6 @@ void PDSS_IdealGas::setPressure(doublereal p)
     m_Vss = GasConstant * m_temp / m_pres;
 }
 
-doublereal PDSS_IdealGas::temperature() const
-{
-    return m_temp;
-}
-
 void PDSS_IdealGas::setTemperature(doublereal temp)
 {
     m_temp = temp;
diff --git a/src/thermo/PDSS_SSVol.cpp b/src/thermo/PDSS_SSVol.cpp
index 7e81b01fa..5c7a1cbb8 100644
--- a/src/thermo/PDSS_SSVol.cpp
+++ b/src/thermo/PDSS_SSVol.cpp
@@ -93,72 +93,17 @@ void PDSS_SSVol::initThermo()
     m_Vss = m_constMolarVolume;
 }
 
-doublereal PDSS_SSVol::enthalpy_RT() const
-{
-    return m_hss_RT;
-}
-
 doublereal PDSS_SSVol::intEnergy_mole() const
 {
     doublereal pV = m_pres * m_Vss;
     return m_h0_RT * GasConstant * m_temp - pV;
 }
 
-doublereal PDSS_SSVol::entropy_R() const
-{
-    return m_sss_R;
-}
-
-doublereal PDSS_SSVol::gibbs_RT() const
-{
-    return m_gss_RT;
-}
-
-doublereal PDSS_SSVol::cp_R() const
-{
-    return m_cpss_R;
-}
-
 doublereal PDSS_SSVol::cv_mole() const
 {
     return (cp_mole() - m_V0);
 }
 
-doublereal PDSS_SSVol::molarVolume() const
-{
-    return m_Vss;
-}
-
-doublereal PDSS_SSVol::density() const
-{
-    return m_mw / m_Vss;
-}
-
-doublereal PDSS_SSVol::gibbs_RT_ref() const
-{
-    return m_g0_RT;
-}
-
-doublereal PDSS_SSVol::enthalpy_RT_ref() const
-{
-    return m_h0_RT;
-}
-
-doublereal PDSS_SSVol::entropy_R_ref() const
-{
-    return m_s0_R;
-}
-
-doublereal PDSS_SSVol::cp_R_ref() const
-{
-    return m_cp0_R;
-}
-
-doublereal PDSS_SSVol::molarVolume_ref() const
-{
-    return m_V0;
-}
-
 void PDSS_SSVol::calcMolarVolume()
 {
     if (volumeModel_ == SSVolume_Model::constant) {