C8H18A(l)+2/13O2(g)=8CO2(g)+9H2O(l)有这样配平的吗?

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C8H18A(l)+2/13O2(g)=8CO2(g)+9H2O(l)有这样配平的吗?C8H18A(l)+2/13O2(g)=8CO2(g)+9H2O(l)有这样配平的吗?C8H18A(l)+2/13

C8H18A(l)+2/13O2(g)=8CO2(g)+9H2O(l)有这样配平的吗?
C8H18A(l)+2/13O2(g)=8CO2(g)+9H2O(l)有这样配平的吗?

C8H18A(l)+2/13O2(g)=8CO2(g)+9H2O(l)有这样配平的吗?
2C8H18+25O2=18H2O+16CO2

C8H18A(l)+2/13O2(g)=8CO2(g)+9H2O(l)有这样配平的吗? H2(g)+1/2O2(g)=H2O(l)与 2H2(g)+ O2(g)=2H2O(l)的燃烧热谁大,为什么 H2(g)+2/1O2(g)=H2O(l) 2H2(g)+O2(g)=2H2O(l) 这两个反应焓变为什么是第一个大? 己知反应2H2(g)+O2(g)===2H2O(l) 焓变 2H2O(l)==2H2(g)+O2(g)反应的ΔH298是多少 1.下列热化学方程式中,化学方程的△H前者大于后者的是 :(1)C(s)+O2(g)=CO2(g);△H1C(s)+1/2O2(g)=CO2(g);△H2(2)S(s)+O2(g)=SO2(g);△H3S(g)+O2(g)=SO2(g);△H4(3)H2(g)+1/2O2(g)=H2O(l);△H52H2(g)+O2(g)=2H2O(l);△H6(4)CaCO3(S)= CH4(g)+2O2(g)=2H2O(l)+CO2(g) △ H=-830.CH4(g)+2O2(g)=2H2O(l)+CO2(g)△ H=-830.32H2O(l)=2H2(g)+O2(g)△ H=+517.61g H2和1g甲烷分别燃烧后,放出热量之比 为什么是 2.3 比1 在同温同压下,下列各组热化学方程式中,△H1>△H2的是( )A 2H2(g)+O2(g)==2H2O(g);△H1 2H2(g)+O2(g)==2H2O(l); △H2B S(g)+O2(g)==SO2(g); △H1 S(s)+O2(g)==SO2(g); △H2C C(s)+1/2O2(g)==CO(g); △H1 C(s)+ O2(g)==CO2 (g) 一道有关焓变题目2H2S(g)+3O2(g)=2SO2(g)+2H2O(l)2H2S(g)+O2(g)=2S(s)+2H2O(l)焓变谁大 求2C2H2(g)+5O2(g)=4CO2(g)+2H2O(l)的焓变2C2H2(g)+5O2(g)=4CO2(g)+2H2O(g)的也可. 氢气,一氧化碳,辛烷,甲烷的化学方程式分别为:H2(g)+(1/2)O2(g)=H2O(l); △H=-285.8kJ/molCO(g)+(1/2)O2(g)=CO2(g) ; △H=-283.0kJ/molC8H18(l)+(25/2)O2(g)=8CO2(g)+9H2O(l);△H=-5518kJ/molCH4(g)+(2)O2(g)=CO2(g)+2H2O(l); △H=-893kJ/mol 相 能正确表示可燃物燃烧热的热化学方程式(详细过程)A.H2(g)+CL2(g)+2HCL(g) H=-18406KJ/molB.CH4(g)+2O2(g)=CO2(g)+2H2O(g) H=-802.3KJ/molC.2CO(g)+O2(g)=2CO2(g) H=-566KJ/molD.H2(g)+1/2O2(g)=H2O(l) H=-28508KJ/molD.H2(g)+1/2O2(g)=H2O(l) H 已知:CH4(g)+ 2O2(g)= CO2(g)+2H2O(l)详见内已知:CH4(g)+ 2O2(g)= CO2(g)+2H2O(l);ΔH = - Q12H2(g)+ O2(g)= 2H2O(g);ΔH = - Q22H2(g)+ O2(g)= 2H2O(l);ΔH = - Q3常温下取体积 根据下列热化学方程式:①C(s)+O2(g)=CO2(g) ΔH1=-393.5 kJ/mol ②H2(g)+1/2O2(g)=H2O(l) ΔH2=-285.8根据下列热化学方程式:①C(s)+O2(g)=CO2(g) ΔH1=-393.5 kJ/mol②H2(g)+1/2O2(g)=H2O(l) ΔH2=-285.8 kJ/mol③CH3COOH(l)+2O2( 下列热化学方程式中的反应热下划线处表示燃烧热的是A.NH3(g)+5/4O2(g)=NO(g)+6/4H20(g) *H= - akJ/molB.C6H12O6(g)+6O2(g)=6CO2(g)+6H2O(l) *H= - bKJ/molC.2CO(g)+O2(g)=2CO2(g) *H= - cKJ/molD.CH3CH2OH(l)+1/2O2=CH3CHO(l 根据下列热化学方程式:①C(s)+O2(g)=CO2(g) ΔH1=-393.5 kJ/mol②H2(g)+1/2O2(g)=H2O(l) ΔH2=-285.8 kJ/mol③CH3COOH(l)+2O2(g)=2CO2(g)+2H2O(l) ΔH3=-870.3 kJ/mol可以计算出2C(s)+2H2(g)+O2(g)=CH3COOH(l)的反应热为()A.ΔH=+ 热反应方程式的含义 H2(g)+1/2 O2(g)=H2O(l)+285.8kj 比较反应放出热量大小2H2S(g)+3O2(g)===2SO2(g)+2H2O(l)+Q1 KJ2H2S(g)+ O2(g)===2S(s)+2H2O(l)+Q2 KJ2H2S(g)+ O2(g)===2S(s)+2H2O(g)+Q3 KJQ2>Q3我知道,但是Q3&Q2与Q1如何比较?