[Matt117]

I was carrying out an experiment where i had a 2 beakers full of HCl. i also had 2.56g of CaCO3 and 1.45g of CaO. i then poured the CaCO3 and measured the temperature change in the reaction which was 20 Degrees overall at the end. i then poured the CaO into the other beaker of HCl and measured the temperature change during the reaction which was 23degrees overall at the end. therefore i can build and equation where i can calculate the deltaH1,2,and 3 values. This is where i had trouble. i did not understand how to calculate this.
The questions was:How Would i calculate the values for (delta)H1 and (delta)H2, assuming that the specific heat capacity of HCl (aq) is 4.2J g-1K-1 and the density of HCl (aq) is 1.0 g cm-3. .
Is the information that i have given is enough to help me calculate the answer?

i know i have to use the equation:
deltah = M.c.deltaT

thanks