AgNO3(aq) + NaCl(aq) → AgCl(s) + NaNO3(aq) 21. In an experiment a student mixes a 50.0 mL sample of — Thermodynamics Chemistry Question

AgNO₃(aq) + NaCl(aq) → AgCl(s) + NaNO₃(aq)

1. In an experiment a student mixes a 50.0 mL sample of 0.100 M AgNO₃(aq) with a 50.0 mL sample of 0.100 M NaCl(aq) at 20.0°C in a coffee-cup calorimeter. Which of the following is the enthalpy change of the precipitation reaction represented above if the final temperature of the mixture is 21.0°C? (Assume that the total mass of the mixture is 100. g and that the specific heat capacity of the mixture is 4.2 J/(g °C).)