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Two Solutions, Initially at 24

Question 85

Multiple Choice

Two solutions, initially at 24.69 °C, are mixed in a coffee cup calorimeter (Ccal = 105.5 J °C-1) . When a 200.0 mL volume of 0.100 mol L-1 AgNO3 solution is mixed with a 100.0 mL sample of 0.100 mol L-1 NaCl solution, the temperature in the calorimeter rises to 25.16 °C. Determine the Two solutions, initially at 24.69 °C, are mixed in a coffee cup calorimeter (C<sub>cal</sub> = 105.5 J °C<sup>-1</sup>) . When a 200.0 mL volume of 0.100 mol L<sup>-1</sup> AgNO<sub>3</sub> solution is mixed with a 100.0 mL sample of 0.100 mol L<sup>-1</sup> NaCl solution, the temperature in the calorimeter rises to 25.16 °C. Determine the H°, in units of kJ . 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. A) -32 kJ mol<sup>-1</sup> B) -78 kJ mol<sup>-1</sup> C) -64 kJ mol<sup>-1</sup> D) -25 kJ mol<sup>-1</sup> E) -52 kJ mol<sup>-1</sup> H°, in units of kJ Two solutions, initially at 24.69 °C, are mixed in a coffee cup calorimeter (C<sub>cal</sub> = 105.5 J °C<sup>-1</sup>) . When a 200.0 mL volume of 0.100 mol L<sup>-1</sup> AgNO<sub>3</sub> solution is mixed with a 100.0 mL sample of 0.100 mol L<sup>-1</sup> NaCl solution, the temperature in the calorimeter rises to 25.16 °C. Determine the H°, in units of kJ . 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. A) -32 kJ mol<sup>-1</sup> B) -78 kJ mol<sup>-1</sup> C) -64 kJ mol<sup>-1</sup> D) -25 kJ mol<sup>-1</sup> E) -52 kJ mol<sup>-1</sup> . 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.


A) -32 kJ mol-1
B) -78 kJ mol-1
C) -64 kJ mol-1
D) -25 kJ mol-1
E) -52 kJ mol-1

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