25 ℃、101 kPa下,碳、氢气、甲烷和葡萄糖的燃烧热依次是ΔH=-393.5 kJ·mol-1、ΔH=-285.8 kJ·mol-1、ΔH=-890.3 kJmol-1、ΔH=-2 800 kJ·mol-1,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-1
B.2H2(g)+O2(g)===2H2O(l) ΔH=-571.6 kJ·mol-1
C.CH4(g)+2O2(g)===CO2(g)+2H2O(g) ΔH=-890.3 kJ·mol-1
D. C6H12O6(s)+3O2(g)===3CO2(g)+3H2O(g) ΔH=-1 400 kJ·mol-1
高三化学选择题中等难度题
25℃、101 kPa下,碳、氢气、甲烷和葡萄糖的燃烧热依次是△H= - 393.5 kJ/mol、 △H= -285.8 kJ/mol、△H= - 890.3 kJ/mol、△H= - 2 800 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)+3O2(g)=3CO2(g)+3H2O(g) △H= - 1400 kJ/mol
高三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)+ 1/2O2(g)=CO(g);△H=-393.5 kJ/mol
B.2H2(g)+O2(g)=2H2O(g);△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
高三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)+1/2O2(g)==CO(g) △H =-393.5 kJ/mol
B.CH4(g)+2O2(g)== CO2(g) + 2H2O(1) △H =-890.3 kJ/mol
C.2H2(g)+O2(g)==2H2O(1) △H = + 571.6 kJ/mol
D.1/2C6H12O6(s) + 3O2(g) === 3CO2(g) + 3H2O(g) △H =-1400 kJ/mol
高三化学选择题中等难度题查看答案及解析
高三化学选择题中等难度题查看答案及解析
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,则下列热化学方程式正确的是
A.C(s)+O2(g)=CO(g) ΔH=-393.5kJ/mol
B.2H2(g)+O2(g)=2H2O(l) ΔH =+571.6kJ/mol
C.CH4(g)+2O2(g)= CO2(g)+2H2O(g) ΔH=-890.3kJ/mol
D.C6H12O6(s)+6O2(g)=6CO2(g)+6H2O(l) ΔH=-2800kJ/mol
高三化学单选题中等难度题查看答案及解析
高三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、890.3一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)+CO2(g)=CO2(g)+2H2O(g);△H=-890.3 kJ/mol
D.C6H12O6(s)+3O2(g)=3CO2(g)+3H2O(l);△H=-1400 kJ/mol
高三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ΔH=-393.5 kJ/mol、ΔH=-285.8 kJ/mol、ΔH=-890.3 kJ/mol、ΔH=-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(l) ΔH=-571.6 kJ/mol
C.CH4(g)+2O2(g)=CO2(g)+2H2O(g) ΔH=-890.3 kJ/mol
D.C6H12O6(s)+3O2(g)=3CO2(g)+3H2O(g) ΔH=-1 400 kJ/mol
高三化学选择题中等难度题查看答案及解析
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,则下列热化学方程式正确的是
A.C(s)+1/2O2(g)=CO(g);△H=-393.5kJ/mol
B.2H2(g)+O2(g)=2H2O(g);△H=+571.6kJ/mol
C.CH4(g)+2O2(g)=CO2(g)+2H2O(g);△H=-890.3 kJ/mol
D.1/2C6H12O6(g)+3O2(g)=3CO2(g)+3H2O(l);△H=-1400kJ/mol
高三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ΔH=-393.5 kJ·mol-1、ΔH=-285.8 kJ·mol-1、ΔH=-890.3 kJmol-1、ΔH=-2 800 kJ·mol-1,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-1
B.2H2(g)+O2(g)===2H2O(l) ΔH=-571.6 kJ·mol-1
C.CH4(g)+2O2(g)===CO2(g)+2H2O(g) ΔH=-890.3 kJ·mol-1
D. C6H12O6(s)+3O2(g)===3CO2(g)+3H2O(g) ΔH=-1 400 kJ·mol-1
高三化学选择题中等难度题查看答案及解析