In a constant-pressure calorimeter, 70.0 mL of 0.340 M Ba(OH)2 was added to 70.0 mL of 0.680 M HCl. The reaction caused the temperature of the solution to rise from 22.00 °C to 26.63 °C. If the solution has the same density and specific heat as water (1.00 g/mL and 4.184 J/g·K, respectively), what is ΔH for this reaction (per mole of H2O produced)? Assume that the total volume is the sum of the individual volumes.

Answer 1

q = mass H2O x 4.184 x 4.63 x 1/1000 = ? kJ heat produced.
That is for 0.680 x 0.07 mols H2O = ?
So dHrxn is q/mols = ?. I think the answer is about 56 kJ/mol or so.