A student mixes a 10. 0 mL sample of 1. 0 M NaOH(aq) with a 10. 0 mL sample of 1. 0 M HCl(aq) in a polystyrene container. The temperature of the solutions before mixing was 20. 0°C. If the final temperature of the mixture is 26. 0°C, what is the experimental value of ΔHᵣxn? (Assume that the solution mixture has a specific heat of 4. 2 J/(g×K) and a density of 1. 0 g/mL)
a) -50. kJ/molᵣxn
b) -25 kJ/molᵣxn
c) -5. 0 × 10⁴ kJ/molᵣxn
d) -5. 0 × 10² kJ/molᵣxn