Answer
Q value = 22.980105 MeV
Work Step by Step
mass of reactant =51.94051 u
mass of product = $2\times25.98259$ u=51.96518 u
mass defect = mass of reactant - mass of product= 0.02467 u
Q value = $mass defect \times931.5$ MeV= 22.980105 MeV