Enter the total change in enthalpy (J) and the total number of moles into the calculator to determine the Molar Enthalpy.
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Molar Enthalpy Formula
The following formula is used to calculate the Molar Enthalpy.
Em = dH / n
- Where Em is the Molar Enthalpy (J/mol)
- dH is the total change in enthalpy (J)
- n is the total number of moles
How to Calculate Molar Enthalpy?
The following two example problems outline how to calculate the Molar Enthalpy.
Example Problem #1:
- First, determine the total change in enthalpy (J). In this example, the total change in enthalpy (J) is given as 500.
- Next, determine the total number of moles. For this problem, the total number of moles is given as 3.
- Finally, calculate the Molar Enthalpy using the equation above:
Em = dH / n
Inserting the values from above and solving the equation:
Em = 500 / 3 = 166.66 (J/mol)
Example Problem #2:
Using the same process as above, first define the variables required by the formula. In this case, these values are provided as the following:
total change in enthalpy (J) = 412
total number of moles = 5
Entering these values gives:
Em = 412 / 5 = 82.4 (J/mol)