When 50cm³ of 0.2 N H₂SO₄ is mixed with 50 cm³ of 1 N KOH, the heat liberated is

Number of equivalents of H⁺ = 0.05 $\times$0.2 = 0.01

Number of equivalents of OH^- = 0.05 $\times$1 = 0.05

limiting reagent is acid

heat liberated = 0.01$\times$57.3 = 0.573kJ = 573J