题目
题型:不详难度:来源:
A.-Y | B.-(10X-Y) | C.-(5X-O.5Y) | D.+(10X-Y) |
已知:CH4(g)+2O2(g)=CO2(g)+2H2O(l)△H=-890kJ/mol CO(g)+1/2O2(g)=CO2(g)△H=-282.5kJ/mol 假如标准状况下由CH4、CO、CO2组成的89.6L混和气体完全燃烧时能放出1010kJ的热量,并生成18g液态水,那么燃烧前混和气体中CO所占的体积百分含量为( ) |
A.-Y | B.-(10X-Y) | C.-(5X-O.5Y) | D.+(10X-Y) |
已知:CH4(g)+2O2(g)=CO2(g)+2H2O(l)△H=-890kJ/mol CO(g)+1/2O2(g)=CO2(g)△H=-282.5kJ/mol 假如标准状况下由CH4、CO、CO2组成的89.6L混和气体完全燃烧时能放出1010kJ的热量,并生成18g液态水,那么燃烧前混和气体中CO所占的体积百分含量为( ) |