OCl–(aq) + Cl–(aq) + 2H+(aq) Cl2(aq) + H2O ΔrH = -202 kJ mol–1
25.0mL of a solution 0.400mol L–1 in both OCl– and Cl– was reacted with excess hydrochloric acid. The mass of the solution after mixing was 100 g.
n(reaction) = 0.0100 mol
Find q(system) in joules.
Assume that the temperature change of the vessel in which the experiment is carried out is negligible
Assume that the heat capacity of the mixture is the same as the specific heat capacity of water (4.184 J g–1 K–1).
I know somewhere you have to use the formula q = mcΔT but I am unsure what to do because there is no temperature in the question.
The Attempt at a Solution
I have tried multiplying the mass and temp change but I think i am wrong. Please help?