题目列表(包括答案和解析)
已知在25℃,101KPa下,1g C8H18(辛烷)燃烧生成二氧化碳和液态水时放出48.40KJ热量。表示上述反应的热化学方程式正确的是
A.C8H18(l)+12.5O2(g)== 8CO2(g) + 9H2O(g) ΔH= ‒ 48.40KJ/mol
B.C8H18(l)+12.5O2(g)== 8CO2(g) + 9H2O(l) ΔH= ‒ 5518KJ/mol
C.C8H18(l)+12.5O2(g)== 8CO2(g) + 9H2O(l) ΔH= +5518KJ/mol
D.C8H18(l)+12.5O2(g)== 8CO2(g) + 9H2O(l) ΔH= ‒ 48.40KJ/mol
已知在25℃,101KPa下,1g C8H18(辛烷)燃烧生成二氧化碳和液态水时放出48.40KJ热量。表示上述反应的热化学方程式正确的是
A.C8H18(l)+12.5O2(g)== 8CO2(g) + 9H2O(g) ΔH= —48.40KJ/mol
B.C8H18(l)+12.5O2(g)== 8CO2(g) + 9H2O(l) ΔH= —5518KJ/mol
C.C8H18(l)+12.5O2(g)== 8CO2(g) + 9H2O(l) ΔH= +5518KJ/mol
D.C8H18(l)+12.5O2(g)== 8CO2(g) + 9H2O(l) ΔH= —48.40KJ/mol
已知在25℃,101KPa下,1g C8H18(辛烷)燃烧生成二氧化碳和液态水时放出48.40KJ热量。表示上述反应的热化学方程式正确的是
A.C8H18(l)+12.5O2(g)== 8CO2(g) + 9H2O(g) ΔH= ‒ 48.40KJ/mol
B.C8H18(l)+12.5O2(g)== 8CO2(g) + 9H2O(l) ΔH= ‒ 5518KJ/mol
C.C8H18(l)+12.5O2(g)== 8CO2(g) + 9H2O(l) ΔH= +5518KJ/mol
D.C8H18(l)+12.5O2(g)== 8CO2(g) + 9H2O(l) ΔH= ‒ 48.40KJ/mol
已知在25℃,101KPa下,1g C8H18(辛烷)燃烧生成二氧化碳和液态水时放出48.40KJ热量。表示上述反应的热化学方程式正确的是
A.C8H18(l)+12.5O2(g)="=" 8CO2(g)+ 9H2O(g) ΔH= ? 48.40KJ/mol |
B.C8H18(l)+12.5O2(g)="=" 8CO2(g)+ 9H2O(l) ΔH= ? 5518KJ/mol |
C.C8H18(l)+12.5O2(g)="=" 8CO2(g)+ 9H2O(l) ΔH= +5518KJ/mol |
D.C8H18(l)+12.5O2(g)="=" 8CO2(g)+ 9H2O(l) ΔH= ? 48.40KJ/mol |
湖北省互联网违法和不良信息举报平台 | 网上有害信息举报专区 | 电信诈骗举报专区 | 涉历史虚无主义有害信息举报专区 | 涉企侵权举报专区
违法和不良信息举报电话:027-86699610 举报邮箱:58377363@163.com