已知2H2(g)+O2(g)=2H2O(l);△H=-571.6kJ/mol,C3H8(g)+5O2(g)=3CO2(g)+4H2O(l);△H=-2220kJ/mol.设有H2和C3H8的混合气体5mol,完全燃烧时共放出热量3847KJ,则混合气体中H2和C3H8的体积比是多少
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![已知2H2(g)+O2(g)=2H2O(l);△H=-571.6kJ/mol,C3H8(g)+5O2(g)=3CO2(g)+4H2O(l);△H=-2220kJ/mol.设有H2和C3H8的混合气体5mol,完全燃烧时共放出热量3847KJ,则混合气体中H2和C3H8的体积比是多少](/uploads/image/z/11288417-41-7.jpg?t=%E5%B7%B2%E7%9F%A52H2%28g%EF%BC%89%2BO2%EF%BC%88g%EF%BC%89%3D2H2O%28l%29%EF%BC%9B%E2%96%B3H%3D-571.6kJ%2Fmol%2CC3H8%28g%29%2B5O2%28g%29%3D3CO2%28g%29%2B4H2O%28l%29%3B%E2%96%B3H%3D-2220kJ%2Fmol.%E8%AE%BE%E6%9C%89H2%E5%92%8CC3H8%E7%9A%84%E6%B7%B7%E5%90%88%E6%B0%94%E4%BD%935mol%2C%E5%AE%8C%E5%85%A8%E7%87%83%E7%83%A7%E6%97%B6%E5%85%B1%E6%94%BE%E5%87%BA%E7%83%AD%E9%87%8F3847KJ%2C%E5%88%99%E6%B7%B7%E5%90%88%E6%B0%94%E4%BD%93%E4%B8%ADH2%E5%92%8CC3H8%E7%9A%84%E4%BD%93%E7%A7%AF%E6%AF%94%E6%98%AF%E5%A4%9A%E5%B0%91)
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已知2H2(g)+O2(g)=2H2O(l);△H=-571.6kJ/mol,C3H8(g)+5O2(g)=3CO2(g)+4H2O(l);△H=-2220kJ/mol.设有H2和C3H8的混合气体5mol,完全燃烧时共放出热量3847KJ,则混合气体中H2和C3H8的体积比是多少
已知2H2(g)+O2(g)=2H2O(l);△H=-571.6kJ/mol,C3H8(g)+5O2(g)=3CO2(g)+4H2O(l);△H=-2220kJ/mol.设有H2和C3H8的混合气体5mol,完全燃烧时共放出热量3847KJ,则混合气体中H2和C3H8的体积比是多少
已知2H2(g)+O2(g)=2H2O(l);△H=-571.6kJ/mol,C3H8(g)+5O2(g)=3CO2(g)+4H2O(l);△H=-2220kJ/mol.设有H2和C3H8的混合气体5mol,完全燃烧时共放出热量3847KJ,则混合气体中H2和C3H8的体积比是多少
设H2的物质的量为x mol,则C3H8的物质的量为5-x mol,由题意,得
571.6 * x / 2 + 2220 *(5 - x) = 3847;
解得x = 3.75 mol,故C3H8的物质的量为1.25 mol,则混合气体中H2和C3H8的体积比即其物质的量的比为 3:1.