即为第20min时的瞬时速率。(A点) (0.40-0.68)mo1L 020min =0.014mol.L.min-l 20min 求第40min时H,O,分解的瞬时速率,(B点) (0.20-0.50molL 040min =0.0075oL1.min-l 40min 求第60min时H2O2分解的瞬时速率,(C点) (0.10-0.33)mo1L U60min -=0.003&moL1.min1 60min 1 1 1 20min 0.014 min 2 0min 0.4 0 0.6 8 − − − = − = − mol L ( )mol L 求第40min时H2O2分解的瞬时速率,(B点) 1 1 1 40min 0.0075 min 4 0min 0.2 0 0.5 0 − − − = − = − mol L ( )mol L 求第60min时H2O2分解的瞬时速率,(C点) 1 1 1 60min 0.0038 min 6 0min 0.1 0 0.3 3 − − − = − = − mol L ( )mol L 即为第20min时的瞬时速率。(A点)