Question

Two solutions, initially at 24.69°C, are mixed in a coffee cup calorimeter (Ccal = 105.5 J/°C). When a 200.0 mL volume of 0.100 M AgNO3 solution is mixed with a 100.0 mL sample of 0.100 M NaCl solution, the temperature in the calorimeter rises to 25.16°C. Determine the DH°rxn, in units of kJ/mol AgCl. Assume that the density and heat capacity of the solutions is the same as that of water. Hint: Write a balanced reaction for the process.

Answer 1

Answer choices:

A. -59 kJ/mol AgCl
B. -78 kJ/mol AgCl
C. -64 kJ/mol AgCl
D. -32 kJ/mol AgCl
E. -25 kJ/mol AgCl