Question

已知热化学方程式 C(g)+O2(g)=CO2(g)； △H=-393.5kJ/mol H2(g)+1/2O2(g)=h

Answer 1

H2(g)+1/2O2(g)=h2o(g)； △H=-285.8kJ/mol

n(C)x393.5=n（H2)x285.8

n(c)/n（H2)=285.8/393.5

m(c)/m(H2)=285.8x12/393.5x2=4.36:1