Enthalpy Change Calculator - Thermodynamics Calculation Online

About This Tool:

Calculate Enthalpy Change of a thermodynamic system using this free Enthalpy Change online calculator tool.

What is Enthalpy Change?

In thermodynamics, enthalpy change states that the change in enthalpy observed to thermodynamic system with constituents of a undergoing a transformation or chemical reaction.

Formula:

Enthalpy change is defined by the following equation:

 ΔH = H_f - H_i 

Where,  

H_f - final enthalpy of the system
H_i - initial enthalpy of the system
ΔH - enthalpy change

Enthalpy Change Calculator

Hf :	joules
Hi :	joules
Enthalpy Change (Δ) :	[joules]

Related Calculator:

• Gibbs Free Energy

Enthalpy Calculator - Thermodynamics Calculation Online

About This Tool:

Calculate total enthalpy energy of a thermodynamic system using this free Thermodynamics online calculator tool.

What is Enthalpy?

In thermodynamic system, Enthalpy is a total energy of a thermodynamic system at constant pressure. Enthalpy is usually expressed as letter "H".

Formula:

The formula to calculate enthalpy is given by:

H = U + PV

Where,

• U - internal energy of the system
• P - product of pressure
• V - volume of the system

Enthalpy Calculator

Reactant A	None O(3P) O(1D) O(1S) O2(3sigma) O2(1delta) O2(1sigma) O3 H OH HO2 H2O H2O2 N N2 NO NO2 NO3 N2O N2O4 N2O5 NH NH3 HNO HNO2 HNO3 S SO SO2 SO3 HS H2S CO CO2 CH3 CH4 HCO H2CO CH3O CH3O2 CH3OOH CH3NO2 CH3ONO CH3NO3 Cl ClO OClO ClO2 ClO3 HCl HOCl NOCl ClNO2 ClNO3 Cl2O CF4 CClF3 CF2Cl2 CFCl3 CCl4 CH3Cl CH2Cl2 C2Cl4 CH3CCl3
Reactant B	None O(3P) O(1D) O(1S) O2(3sigma) O2(1delta) O2(1sigma) O3 H OH HO2 H2O H2O2 N N2 NO NO2 NO3 N2O N2O4 N2O5 NH NH3 HNO HNO2 HNO3 S SO SO2 SO3 HS H2S CO CO2 CH3 CH4 HCO H2CO CH3O CH3O2 CH3OOH CH3NO2 CH3ONO CH3NO3 Cl ClO OClO ClO2 ClO3 HCl HOCl NOCl ClNO2 ClNO3 Cl2O CF4 CClF3 CF2Cl2 CFCl3 CCl4 CH3Cl CH2Cl2 C2Cl4 CH3CCl3
Reactant C	None O(3P) O(1D) O(1S) O2(3sigma) O2(1delta) O2(1sigma) O3 H OH HO2 H2O H2O2 N N2 NO NO2 NO3 N2O N2O4 N2O5 NH NH3 HNO HNO2 HNO3 S SO SO2 SO3 HS H2S CO CO2 CH3 CH4 HCO H2CO CH3O CH3O2 CH3OOH CH3NO2 CH3ONO CH3NO3 Cl ClO OClO ClO2 ClO3 HCl HOCl NOCl ClNO2 ClNO3 Cl2O CF4 CClF3 CF2Cl2 CFCl3 CCl4 CH3Cl CH2Cl2 C2Cl4 CH3CCl3
Product A	None O(3P) O(1D) O(1S) O2(3sigma) O2(1delta) O2(1sigma) O3 H OH HO2 H2O H2O2 N N2 NO NO2 NO3 N2O N2O4 N2O5 NH NH3 HNO HNO2 HNO3 S SO SO2 SO3 HS H2S CO CO2 CH3 CH4 HCO H2CO CH3O CH3O2 CH3OOH CH3NO2 CH3ONO CH3NO3 Cl ClO OClO ClO2 ClO3 HCl HOCl NOCl ClNO2 ClNO3 Cl2O CF4 CClF3 CF2Cl2 CFCl3 CCl4 CH3Cl CH2Cl2 C2Cl4 CH3CCl3
Product B	None O(3P) O(1D) O(1S) O2(3sigma) O2(1delta) O2(1sigma) O3 H OH HO2 H2O H2O2 N N2 NO NO2 NO3 N2O N2O4 N2O5 NH NH3 HNO HNO2 HNO3 S SO SO2 SO3 HS H2S CO CO2 CH3 CH4 HCO H2CO CH3O CH3O2 CH3OOH CH3NO2 CH3ONO CH3NO3 Cl ClO OClO ClO2 ClO3 HCl HOCl NOCl ClNO2 ClNO3 Cl2O CF4 CClF3 CF2Cl2 CFCl3 CCl4 CH3Cl CH2Cl2 C2Cl4 CH3CCl3
Product C	None O(3P) O(1D) O(1S) O2(3sigma) O2(1delta) O2(1sigma) O3 H OH HO2 H2O H2O2 N N2 NO NO2 NO3 N2O N2O4 N2O5 NH NH3 HNO HNO2 HNO3 S SO SO2 SO3 HS H2S CO CO2 CH3 CH4 HCO H2CO CH3O CH3O2 CH3OOH CH3NO2 CH3ONO CH3NO3 Cl ClO OClO ClO2 ClO3 HCl HOCl NOCl ClNO2 ClNO3 Cl2O CF4 CClF3 CF2Cl2 CFCl3 CCl4 CH3Cl CH2Cl2 C2Cl4 CH3CCl3
Enthalpy	kcal/mol