corrected heat of formation for water vapour

tutorials/lagrangian/porousExplicitSourceReactingParcelFoam/filter/constant/thermo.incompressiblePoly

 (
-N2 N2   1   28.0134
+    // Nitrogen
+    N2 N2   1   28.0134
     rhoPolynomial
     (
         3.88E+000
@@ -11,8 +12,8 @@ N2 N2   1   28.0134
         0
         0
     )
-    0.0                                 // Heat of formation
-    0.0                                 // Standard entropy
+    0.0                                      // Heat of formation [J/kg]
+    6840                                     // Standard entropy [J/kg/K]
     cpPolynomial
     (
         2.75E+004
@@ -46,7 +47,9 @@ N2 N2   1   28.0134
         0
         0
     )
-O2 O2   1   31.9988
+
+    // Oxygen
+    O2 O2   1   31.9988
     rhoPolynomial
     (
         4.43E+000
@@ -58,8 +61,8 @@ O2 O2   1   31.9988
         0
         0
     )
-    0.0                                 // Heat of formation
-    0.0                                 // Standard entropy
+    0.0                                  // Heat of formation [J/kg]
+    6408                                 // Standard entropy [J/kg/K]
     cpPolynomial
     (
         2.67E+004
@@ -93,7 +96,9 @@ O2 O2   1   31.9988
         0
         0
     )
-H2O H2O 1   18.0153
+
+    // Water vapour
+    H2O H2O 1   18.0153
     rhoPolynomial
     (
         2.49E+000
@@ -105,8 +110,8 @@ H2O H2O 1   18.0153
         0
         0
     )
-    -241.8                                 // Heat of formation
-    0.0                                    // Standard entropy
+   -1.3423e07                                // Heat of formation [J/kg]
+    1.0482e04                                // Standard entropy [J/kg/K]
     cpPolynomial
     (
         2.85E+004