Heat of Dissolution Calculator

Formula

To calculate the heat of dissolution:

\[ q = \frac{m \cdot c \cdot \Delta T}{n} \]

Where:

\( q \) is the heat of dissolution (J/mol)
\( m \) is the mass of solvent (g)
\( c \) is the specific heat of solvent (J/g°C)
\( \Delta T \) is the change in temperature (°C)
\( n \) is the moles of solute (mol)

Heat of Dissolution Definition

The heat of dissolution, also known as the enthalpy of dissolution, is the amount of heat energy absorbed or released when a solute dissolves in a solvent. This process can either be endothermic (absorbing heat) or exothermic (releasing heat), depending on the nature of the solute and solvent involved. The heat of dissolution is an important parameter in thermodynamics and chemistry, as it helps in understanding the energy changes that occur during the formation of a solution.

Example Calculation 1

Let's assume the following values:

Mass of Solvent (m) = 200 g
Specific Heat of Solvent (c) = 4.18 J/g°C
Change in Temperature (ΔT) = 10°C
Moles of Solute (n) = 2 mol

Using the formula:

\[ q = \frac{200 \cdot 4.18 \cdot 10}{2} = 4180.00 \]

The heat of dissolution is 4180.00 J/mol.

Example Calculation 2

Let's assume the following values:

Mass of Solvent (m) = 150 g
Specific Heat of Solvent (c) = 2.09 J/g°C
Change in Temperature (ΔT) = 5°C
Moles of Solute (n) = 3 mol

Using the formula:

\[ q = \frac{150 \cdot 2.09 \cdot 5}{3} = 522.50 \]

The heat of dissolution is 522.50 J/mol.