Question

When 50.0 mL of 0.400 M Ca(NO3)2 is added to 50.0 mL of 0.800 M NaF, CaF2 precipitates, as shown in the net ionic equation below. The initial temperature of both solutions is 23.0C. Assuming that the reaction goes to completion, and that the resulting solution has a mass of 100.00 g and a specific heat of 4.18 J/(g C), calculate the final temperature of the solution.
Ca2+(aq) + 2 F-(aq) -> CaF2(s) H = -11.5 kJ
A) 22.45C
B) 23.55C
C) 24.10C
D) 24.65C

Answer

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