How to calculate enthalpy change of neutralisation - what mass?

How to calculate enthalpy change of neutralisation - what mass?


I made an experiment where I reacted 100ml HCL 2M with 100ml NaOH 2M in 1300ml Water, and got a temperature change dT.


My question is do i use 1500g in the formula, Q=mcdT ?


c (specific heat capacity) will be calculated from another experiment where I measure the work required to heat the same solution to ~dT. In wheere I also need this mass


Do I include the small amount of HCl and NaOH?


Many thanks!


