已知2H2(g)+O2(g)=2H2O(l);△H=-571.6kJ/mol,C3H8(g)+5O2(g)=3CO2(g
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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
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.
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.
已知2H2(g)+O2(g)=2H2O(l);△H=-571.6kJ/mol,C3H8(g)+5O2(g)=3CO2(g
已知:H2(g)+1/2O2(g)==H2O(l);△H=-285.6kJ/mol C3H8(g)+5O2(g)==3C
已知:2H2(g)+O2(g)=2H2O(l) △H=-571.6kj/mol 2h2(g)+O2(g)=2H2O(g)
已知2H2(g)+O2(g)==2H2O(l) △H=-571.6KJ/mol CH4(g)+2O2(g)==CO2(g
已知:2H2(g)+O2(g)=2H2O(l) △H=-571.6KJ/mol CH4(g)+2O2(g)=CO2(g)
已知2H2O(L)=2H2(g)+O2(g) △H=+571.6kJ/mol CH4(g)+2O2(g)=CO2(g)+
已知:CH4(g)+2O2(g)=CO2(g)+2H2O(l)△H=-890.3 KJ*mol-1H2(g)+0.5O2
高二化学2H2(g)+O2(g)=2H2O(1) △H=571、6kj、mol-1次方 C3H8(g)+5O2(g)=3
2H2(g)+O2(g)=2H2O (l) H=-571.6kj/mol
已知2H2(g)+O2(g)=2H2O(g)△H=-484kj/mol 2H2(g)+O2(g)=2H2O(l)△H=-
已知:2H2(g)+O2(g)═2H2O(l)△H=-571.6kJ•mol-1;CH4(g)+2O2(g)═CO2(g
已知:2H2(g)+O2(g)=2H2O(l) △H=571.6kj/mol