In a coffee-cup calorimeter experiment, 10.00 g of a soluble ionic compound was added to the calorimeter contained 75.0 g h2o initially at 23.2°c. the final temperature of the solution was 31.8°c. what was the change in enthalpy for the dissolution of this compound?

The enthalpy for dissolution is - 305.558 J/g

Solution:

Mass of the ionic compound, m = 10.00 g

Mass of water, m' = 75.0 g

Initial temperature, T =

Final Temperature, T' =

Now,

To calculate the change in enthalpy:

We know that the specific heat of water is 4.18

Total mass of the solution, M = m + m' = 10.00 + 75.0 = 85.0 g

Temperature, difference,

Thus

The heat absorbed by the solution is given by:

Enthalpy,

wavelength divides in half and speed stays the same.