Heat of Solution Calculator

Heat of Solution Calculator:

Heat of Solution, HS(kJ/mol) in kiloJoules per mole involves dividing the heat absorbed or released, q(kJ) in kiloJoules by the number of moles of solute dissolved, n(mol) in mole.

Enter Heat Absorbed or Released : kJ
Enter Number of Solute Dissolved : mol
   
Result – Heat of Solution : kJ/mol

Heat of Solution Formula:

The heat of solution (HS) is the amount of heat energy absorbed or released when a solute dissolves in a solvent to form a solution. This energy change occurs because bonds between molecules or ions are either broken or formed during the dissolution process.

The heat of solution is an important concept in chemistry and thermodynamics, as it helps to understand the energetics of dissolving substances. If the solution process absorbs energy, it is termed endothermic and has a positive heat of solution. Conversely, if it releases energy, it is exothermic and has a negative heat of solution. The heat of solution is typically measured in units of kJ/mol. It depends on factors such as the nature of the solute and solvent, the temperature, and the concentration.

In practical terms, understanding the heat of solution is crucial for applications in chemical engineering, pharmaceuticals, and other fields where solutions are commonly used. The formula for the heat of solution involves dividing the heat absorbed or released (q) by the number of moles of solute (n) dissolved.

Enter the values of heat absorbed or released, q(kJ) and number of moles of solute dissolved, n(mol) to determine the value of Heat of Solution, HS(kJ/mol).

Heat of Solution, HS(kJ/mol) = q(kJ) / n(mol)

HS(kJ/mol) = heat of solution in kiloJoules per mole, kJ/mol.

q(kJ) = heat absorbed or released in kiloJoules, kJ.

n(mol) = number of solute dissolved in moles, mol.

Heat of Solution Calculation:

1.A solution process absorbs 50 kJ of energy while dissolving 2 moles of a solute. Calculate the heat of solution.

Given: q(kJ) = 50kJ, n(mol) = 2moles.

Heat of Solution, HS(kJ/mol) = q(kJ) / n(mol)

HS(kJ/mol) = 50 / 2

HS(kJ/mol) = 25kJ/mol.

2.A solution releases 18 kJ of energy when 0.5 mol of solute dissolves. Calculate the heat of solution.

Given: q(kJ) = -18 kJ (negative because energy is released), n(mol) = 0.5moles.

Heat of Solution, HS(kJ/mol) = q(kJ) / n(mol)

HS(kJ/mol) = -18 / 0.5

HS(kJ/mol) = -36kJ/mol.

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