In a class demonstration, we saw an example of an aqueous reaction caused by mor
ID: 1048651 • Letter: I
Question
In a class demonstration, we saw an example of an aqueous reaction caused by more than one driving force at work with both the formation of water AND the precipitation of BaSO_4 driving the reaction shown below, effectively removing "all" ions from solution (light bulb when dark) H_2SO_4(aq) + Ba(OH)_2 (aq) rightarrow 2 H_2O(l) + BaSO_4(s) When 50.0 mL of H_2SO_4 containing 0.490 grams of H_2SO_4 at 25.00 degree C was neutralized with a barium hydroxide solution also at 25.00 degree C. 100.0 ml. of the Ba(OH)_2 (aq) was needed. The temperature of the resultant neutralized solution rose to 25.90 degree C. How many kilojoules of energy must have been released during the reaction? Assume the density of this final solution and its heat capacity to be equal to those of pure water.
Explanation / Answer
Heat released during reaction = mass of solution *specific hest capacity *change
in temperature. during reaction