已知25℃、101kPa下,碳、氢气、甲烷和葡萄糖的燃烧热依次是393.5kJ/mol、285.8kJ/mol、890.3kJ/mol、2800kJ/mol,则热化学方程式正确的是
A.C(s)+O2(g)=CO(g) △H=-393.5kJ/mol
B.2H2(g)+O2(g)=2H2O(g) △H=+571.6kJ/mol
C.CH4(g)+2O2(g)=2H2O(l)+CO2(g) △H=-890.3kJ/mol
D.C6H12O6(s)+3O2(g)=3CO2(g)+3H2O(g) △H=-1400kJ/mol
高二化学单选题简单题
已知25℃、101kPa下,碳、氢气、甲烷和葡萄糖的燃烧热依次是393.5kJ/mol、285.8kJ/mol、890.3kJ/mol、2800kJ/mol,则热化学方程式正确的是
A.C(s)+O2(g)=CO(g) △H=-393.5kJ/mol
B.2H2(g)+O2(g)=2H2O(g) △H=+571.6kJ/mol
C.CH4(g)+2O2(g)=2H2O(l)+CO2(g) △H=-890.3kJ/mol
D.C6H12O6(s)+3O2(g)=3CO2(g)+3H2O(g) △H=-1400kJ/mol
高二化学单选题简单题查看答案及解析
25℃、101 kPa下,碳、氢气、甲烷和葡萄糖的燃烧热依次是393.5 kJ/mol、285.8 kJ/mol、890.3 kJ/mol、2 800 kJ/mol,则下列热化学方程式正确的是 ( )
A.C(s)+O2(g)=CO(g) ΔH=-393.5 kJ/mol
B.2H2(g)+O2(g)=2H2O(g) ΔH=+571.6 kJ/mol
C.C6H12O6(s)+3O2(g)=3CO2(g)+3H2O(l) ΔH=-1 400 kJ/mol
D.CH4(g)+2O2(g)=CO2(g)+2H2O(g) ΔH=-890.3 kJ/mol
高二化学选择题中等难度题查看答案及解析
25℃、101 kPa下,碳、氢气、甲烷和葡萄糖的燃烧热依次是393.5 kJ/mol、285.8 kJ/mol、
890.3 kJ/mol、2800 kJ/mol,则下列热化学方程式正确的是( )
A.C(s)+O2(g)=CO(g) △H= ―393.5 kJ/mol
B.2H2(g)+O2(g)=2H2O(l) △H= +571.6 kJ/mol
C.CH4(g)+2O2(g)=CO2(g)+2H2O(g) △H= ―890.3 kJ/mol
D.C6H12O6(s) +6O2(g)=6CO2(g)+6H2O(l) △H= ―2800 kJ/mol
高二化学选择题简单题查看答案及解析
25℃、101 kPa下,碳、氢气、甲烷和葡萄糖的燃烧热依次是393.5 kJ/mol、285.8 kJ/mol、890.3 kJ/mol、2800 kJ/mol,则下列热化学方程式正确的是 ( )
A.C(s)+O2(g)=CO(g) △H = ―393.5 kJ/mol
B.2H2(g)+O2(g)=2H2O(l) △H = +571.6 kJ/mol
C.CH4(g)+2O2(g)=CO2(g) +2H2O(g) △H = ―890.3 kJ/mol
D.C6H12O6(s) +6O2(g)=6CO2(g)+6H2O(l) △H = ―2800 kJ/mol
高二化学选择题简单题查看答案及解析
25℃、101 kPa下,碳、氢气、甲烷和葡萄糖的燃烧热依次是393.5 kJ/mol、285.8 kJ/mol、890.3kJ/mol、2800 kJ/mol。则下列热化学方程式正确的是 ( )
A.C(s)+1/2O2(g)=CO(g);△H= - 393.5 kJ/mol
B.2H2(g)+O2(g)=2H2O(l);△H=+571.6 kJ/mol
C.CH4(g)+2O2(g)=CO2(g)+2H2O(g);△H=-890.3 kJ/mol
D.1/2C6H12O6(s)+3O2(g)=3CO2(g)+3H2O(l);△H=-1400 kJ/mol
高二化学选择题中等难度题查看答案及解析
25℃、101 kPa下,碳、氢气、甲烷和葡萄糖的燃烧热依次是393.5 kJ/mol、285.8 kJ/mol、890.3 kJ/mol、2800 kJ/mol,则下列热化学方程式正确的是( )
A. C(s)+1/2 O2(g)=CO(g) △H= ―393.5 kJ/mol
B. 2H2(g)+O2(g)=2H2O(l) △H= +571.6 kJ/mol
C. CH4(g)+2O2(g)=CO2(g)+2H2O(g) △H= ―890.3 kJ/mol
D. C6H12O6(s) +6O2(g)=6CO2(g)+6H2O(l) △H=―2800 kJ/mol
高二化学选择题中等难度题查看答案及解析
25℃、101 kPa下,碳、氢气、甲烷和葡萄糖的燃烧热依次是393.5 kJ/mol、285.8 kJ/mol、
890.3 kJ/mol、2800 kJ/mol,则下列热化学方程式正确的是( )
A.C(s)+O2(g)=CO(g);△H=-393.5 kJ/mol B.2H2(g)+O2(g)=2H2O(g);△H=+571.6 kJ/mol
C.CH4g)+2O2(g)=CO2(g)+2H2O(g);△H=-890.3 kJ/mol
D.C6H12O6(s)+3O2(g)=3CO2(g)+3H2O(l);△H=-1 400 kJ/mol
高二化学选择题简单题查看答案及解析
25℃、101 kPa下,碳、氢气、甲烷和葡萄糖的燃烧热依次是393.5 kJ/mol、285.8 kJ/mol、890.3 kJ/mol、2800 kJ/mol,则下列热化学方程式正确的是( )
A.C(s)+1/2 O2(g)=CO(g) △H= ―393.5 kJ/mol
B.2H2(g)+O2(g)=2H2O(l) △H= +571.6 kJ/mol
C.CH4(g)+2O2(g)=CO2(g)+2H2O(g) △H= ―890.3 kJ/mol
D.C6H12O6(s) +6O2(g)=6CO2(g)+6H2O(l) △H= ―2800 kJ/mol
高二化学选择题简单题查看答案及解析
25℃、101 kPa下,碳、氢气、甲烷和葡萄糖的燃烧热依次是393.5 kJ/mol、285.8 kJ/mol、890.3 kJ/mol、2800 kJ/mol,则下列热化学方程式正确的是( )
A. C(s)+ O2(g)=CO(g) ΔH =-393.5 kJ/mol
B. 2H2(g)+O2(g)=2H2O(l) ΔH = +571.6 kJ/mol
C. CH4(g)+2O2(g)=CO2(g)+2H2O(g) ΔH =-890.3 kJ/mol
D. C6H12O6(s) +6O2(g)=6CO2(g)+6H2O(l) ΔH =-2800 kJ/mol
高二化学选择题中等难度题查看答案及解析
高二化学选择题中等难度题查看答案及解析