Is there a simple formula for the Enthalpy of solution and/or hydration?

There is a procedure, not a formula which depends on what information is given. Tell us more.

Well to be honest I wasn't there for the teaching of this in my class due to University interviews.

I was just wondering how you actually work through them as other websites i have been on have all been in too much (universty standard) detail.

Thank you for the fast response!

Am I Correct in assuming this?

dH of solution = -dH of lattice enthalpy + dH of hydration

E.g:
ÄHsolution NaCl = -ÄHLE NaCl(s) + ÄHhyd Na+(g) + ÄHhyd Cl-(g)

Units as kJmol-1

Yes, there is a simple formula to calculate the enthalpy of solution and/or hydration of a substance. The formula is:

ΔH = ΔHsolvent + ΔHsolute

where ΔH is the enthalpy change, ΔHsolvent is the enthalpy change of the solvent, and ΔHsolute is the enthalpy change of the solute.

To calculate the enthalpy of solution, you need to know the enthalpy change of the solvent when it dissolves and the enthalpy change of the solute when it dissolves.

To calculate the enthalpy of hydration, you need to know the enthalpy change of the water molecule(s) when it binds with the solute.

Keep in mind that the enthalpy of solution and/or hydration can be positive or negative, which indicates whether the process is endothermic or exothermic, respectively. Positive values indicate that energy is absorbed while negative values indicate that energy is released.

To determine the enthalpy change experimentally, you can use methods such as calorimetry or measure temperature changes during the process. Alternatively, you can also estimate the enthalpy change using theoretical calculations or thermodynamic databases.

So, to summarize, the simple formula to calculate the enthalpy of solution and/or hydration is ΔH = ΔHsolvent + ΔHsolute, and you can determine these values experimentally or estimate them using other methods.