反应率的调量力法 2H]Oz(aq) 2H2O(+O2(g) 2H,O,(aq)-+2H,O(+O(g) dP over time Br,(aq)+HCOoH (ag) 2Br(ag)+ 2H*(ag)+CO, (g) ope of ABr2)c△ Absorption Wavelength(nm) mime (s! tBrI (M) Rate (/el bowa 400x10 反应遮率常数的物理 3.50x10-3s-l 66 2H2O2 (aq) 2H2O (l) + O2 (g) measure dP over time pV = nRT p = RT = (O2)RT n V (O2) = p RT 1 rate = d(O2) dt RT 1 dp dt = ● 反应速率的测量方法 2H2O2 (aq) 2H2O (l) + O2 (g) Br2 (aq) + HCOOH (aq) 2Br- (aq) + 2H+ (aq) + CO2 (g) time 393 nm light Detector ∆(Br2) ∝ ∆Absorption 393 nm Br2 (aq) Br2 (aq) + HCOOH (aq) 2Br- (aq) + 2H+ (aq) + CO2 (g) slope of tangent slope of tangent slope of tangent rate = k (Br2) k = rate (Br2) = 3.50 × 10−3 s−1 反 应 速 率 常 数 的 物 理 意 义