I'm asking this because I watched 3 youtube videos and each one explained it differently with different results
when we have let's say 50 grams of NaOH dissolved in 100g water and the temperature of the water increases by 17.5, and we are given that the heat capacity of water is 4.18 and we are required to find the enthalpy of dissolution
when we use deltaH=mC(deltaT)
in the m, do we use the total mass of solution or only the mass of water?
m=100 or 150? that makes a lot of difference!
one video used 100 and then only used the mass of NaOH to get the moles and then find the molar enthalpy, the other videos used 150 from the start as m...
any clear answer please?
thanks