App description

Enthalpy online calculator, Enthalpy calculator, Enthalpy value calculation

The following table calculates the reaction enthalpy as NO<SUB>3</SUB> + H<SUB>2</SUB>O -----> HNO<SUB>3</SUB> + OH

Please keep in mind the following rules:

<TABLE> <TBODY> <TR> <TH>Enthusiastic change</TH> <TH>Spontaneous reaction?</TH> </TR> <TR> <TD>Heat release (dH < 0)</TD> <TD>Yes, dG < 0</TD> </TR> <TR> <TD>Heat release (dH < 0)</TD> <TD>If |T dS| < |dH|</TD> </TR> <TR> <TD>Endothermic (dH > 0)</TD> <TD>If T dS > dH</TD> </TR> <TR> <TD>Endothermic (dH > 0)</TD> <TD>No, dG > 0</TD> </TR> </TBODY> </TABLE>

Usage example

Reactant A: NO3

Reactant B: H2O

Reactant C: None

Product A: HNO3

Product B: OH

Product C: None

Click "Enthalpy value" and output the result.

Enthalpy results (kcal/mol)： 17.826

Note

When reactants and products are two chemical formulas, the third one is "None".