你可能感兴趣的试题
CH4(g)＋2O2(g)＝CO2(g)＋4H2O(g) ΔH＝－890 kJ/mol CH4(g)＋2O2(g)＝CO2(g)＋2H2O(l) ΔH＝＋890 kJ/mol CH4(g)＋2O2(g)＝CO2(g)＋2H2O(l) ΔH＝－890 kJ/mol 
CH4(g)＋O2(g)＝CO2(g)＋H2O(l) ΔH＝－890 kJ/mol
甲烷的燃烧热为890.3 kJ·mol－1，则甲烷燃烧的热化学方程式可表示为：CH4(g)＋2O2(g)===CO2(g)＋2H2O(g) ΔH＝－890.3 kJ·mol－1 500 ℃、30 MPa下，将0.5 mol N2和1.5 mol H2置于密闭容器中充分反应生成NH3(g)，放热19.3 kJ，其热化学方程式为N2(g)＋3H2(g)
2NH3(g) ΔH＝－38.6 kJ·mol－1 已知在120 ℃、101 kPa下，1 g H2燃烧生成水蒸气放出121 kJ热量，其热化学方程式为H2(g)＋1/2O2(g)===H2O(g) ΔH＝－242 kJ·mol－1 25 ℃、101 kPa时，强酸与强碱的稀溶液发生反应的中和热为57.3 kJ·mol－1，硫酸稀溶液与氢氧化钾稀溶液反应的热化学方程式为：H2SO4(aq)＋2KOH(aq)＝ K2SO4(aq)＋2H2O(l) ΔH＝－114.6 kJ·mol－1
1/2CH4(g) + O2(g) = 1/2CO2(g) + H2O(l) ΔH.= +445 kJ·mol-1 CH4(g) + 2O2(g) = CO2(g) +2H2O(l) ΔH.= +890 kJ·mol-1 CH4(g) + 2O2(g) = CO2(g) +2H2O(l) ΔH.= －890 kJ·mol-1 2CH4(g) + 4O2(g) = 2CO2(g) + 4H2O(l) ΔH.= －1780 kJ·mol-1
2CH4( g)+4O2(g)=2CO2(g)+4H2O(1) △H = +890kJ·mol-1 CH4(g)+2O2(g)=CO2(g)+2H2O(g) △H = +890 kJ·mol-1 1／2CH4(g)+O2(g)=1／2CO2(g)+H2O(g) △H = —445 kJ·mol-1 CH4(g)+2O2(g)=CO2(g)+2H2O(1) △H = —890 kJ·mol-1
H2(g) CO(g) C.8H18(l) CH4(g)
H2(g) CO(g) C.8H18(l) CH4(g)
1/2CH4(g) + O2(g) = 1/2CO2(g) + H2O(l) ΔH.= +445 kJ·mol-1 CH4(g) + 2O2(g) = CO2(g) +2H2O(l) ΔH.= +890 kJ·mol-1 CH4(g) + 2O2(g) = CO2(g) +2H2O(l) ΔH.= －890 kJ·mol-1 2CH4(g) + 4O2(g) = 2CO2(g) + 4H2O(l) ΔH.= －1780 kJ·mol-1
正戊烷的燃烧热大于3531.3 kJ·mol－1 相同质量的烷烃、碳的质量分数越大，燃烧放出的热量越多 正丁烷转化为异丁烷的热化学方程式为： CH3CH2CH2CH3(g)—→CH3CH(CH3)CH3(g) ΔH.＝＋8.4 kJ·mol－1 甲烷燃烧的热化学方程式为：CH4(g)＋2O2(g)—→CO2(g)＋2H2O(g) ΔH.＝－891.0 kJ·mol－1
1/2CH4(g)+ O2(g)=1/2CO2(g)+ H2O(l) △H =+445kJ·mol-1 CH4(g)+ 2O2(g)= CO2(g)+2H2O(l) △H =+890kJ·mol-1 CH4(g)+ 2O2(g)= CO2(g) +2H2O(l) △H =-890kJ·mol-1 2CH4(g) + 4O2(g)= 2CO2(g)+ 4H2O(l) △H =-1780kJ·mol-1
氢气的燃烧热为285.5 kJ/mol，则水电解的热化学方程式为： 2H2O(l)=2H2(g)+O2(g) △H=+285.5kJ/mol 1mol甲烷完全燃烧生成CO2和H2O(l)时放出890 kJ热量，它的热化学方程式为：1/2CH4(g)+O2(g)=1/2CO2(g)+H2O(l) △H=-445kJ/mol 已知2C(s)+O2(g)=2CO(g) △H= -221 kJ/mol，则C.（碳）的燃烧热为110.5 kJ/mol 醋酸与NaOH溶液反应：H+(aq)+OH-(aq)=H2O(l) △H=-57.3 kJ/mol
湘公网安备 43130202000226号