Possibility of calculating the energy density of a solution?

[Mohammad Fakhrey]

How can I calculate the internal energy of a solution by knowing all of it's elements?..is this possibly?

 

For example:

If I have 2 liters of salting water [latex]\mathbf{NaCl_{(aq)}+H_2O_{(l)}}[/latex] contains 1.5 g of salt, how can I determine the internal energy stored in it?

 

[Ayesha]

We cannot measure the internal energy in a system, we can only determine the change in internal energy.