19.
In an experiment, 100 cm3 of dilute hydrochloric acid solution is mixed with 100 cm3 sodium hydroxide solution in a polystyrene cup. The concentrations of the two solutions are the same. During the mixing, the temperature of the mixture increased by 7 0C.What is the heat released in the experiment?Given that the specific heat capacity of the solution is 4.2 J g-1 0C-1.