Quique mixed 100. milliliters of 1.0 M BaCl₂(aq) and 200. milliliters of 0.5 M Na₂SO4(aq) in a coffee cup calorimeter at 45.0°C. The
solutions reacted completely according to the reaction described below.
BaCl₂(aq) + Na₂SO4(aq) → BaSO4(s) + 2 NaCl(aq)
During the reaction, the temperature of the water in Quique's calorimeter dropped to 15.8°C. What is the heat of this endothermic
reaction?
A)
B)
9
D)
-366 kJ/mol BaCl₂
-198 kl/mol BaCl₂
198 kJ/mol BaCl₂
366 kJ/mol BaCl₂