Question

For KNO3 the heat of solution is 23.8 kJ/mol and the lattice energy is -685.0 kJ/mol. Calculate the heat of hydration.

Answer 1

Answer: The heat of hydration for potassium nitrate is 708.8 kJ/mol

Step-by-step explanation:

We are given:

Heat of solution for potassium nitrate = 23.8 kJ/mol

Lattice energy for potassium nitrate = -685.0 kJ/mol

Heat of hydration for potassium nitrate = ?

To calculate the heat of hydration, we use the equation:

Heat of the solution = Heat of hydration + Lattice energy

Putting values in above equation, we get:

`23.8=\text{Heat of hydration}+(-685.0)\\\\\text{Heat of hydration}=23.8-(-685.0)\\\\\text{Heat of hydration}=708.8kJ/mol`

Hence, the heat of hydration for potassium nitrate is 708.8 kJ/mol