6.
已知下列热化学方程式:
\(\rm{①H_{2}(g)+\dfrac{1}{2}O_{2}(g)=H_{2}O(l)\triangle H=-285.8kJ/mol}\) \(\rm{②H_{2}(g)+\dfrac{1}{2}O_{2}(g)=H_{2}O(g)\triangle H=-241.8kJ/mol}\)
\(\rm{③C(s)+\dfrac{1}{2}O_{2}(g)=CO (g)\triangle H=-110.5kJ/mol}\) \(\rm{④C(s)+O_{2}(g)=CO_{2}(g)\triangle H=-393.5kJ/mol}\)
回答下列问题:
\(\rm{(1)}\)上述反应中属于放热反应的是____________\(\rm{(}\)填序号,下同\(\rm{)}\)
\(\rm{(2)H_{2}}\)的燃烧热为____________,\(\rm{C}\)的燃烧热为____________
\(\rm{(3)}\)常温下燃烧\(\rm{3g}\)等体积的\(\rm{H_{2}}\)和\(\rm{CO}\)的混合气体生成液态水和\(\rm{CO_{2}}\),放出的热量为____________
\(\rm{(4)CO}\)的燃烧热为____________,其热化学方程式为______________________________________________.