I did a school experiment to measure the heat of solution (enthalpy) of various salts dissolved in water. My results are completely different to the teacher's answer.
Specifically my test showed Calcium Chloride increasing the temperature of the cup of water by 6 degrees Celcius, while the Magnesium Chloride only increased the temperature of the same volume of water by 1 degree Celcius.
The teacher's answer shows Magnesium Chloride with an enthalpy more than double (twice as negative) as that of Calcium Chloride.
I'm happy to be wrong about this but could someone point me to an "official" answer so I can conclude that the experiment was done incorrectly.