How to get the mass of solution (in grams) given this information? Specific heat of solution – 4.19J/g°C Mass of NaOH pellets (grams) 20.0g Initial water temperature (°C) 20.0°C Final solution temperature (°C) 51.29°C Temperature change (∆°C) 31.29°C Mass of solution (in grams) = ?? also the equation is : NaOH(s) + H2O (l) → Na (aq) + OH (aq)