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Chemistry, 22.04.2020 23:47 jngonzo1226

O acetileno, gás de fórmula C2H2 muito usado em maçaricos, sofre combustão com o oxigênio do ar de acordo com a seguinte reação:

C2H2 + 5/2 O2 → 2 CO2 + H2O ΔH = 300 kcal/mol de C2H2

Considerando que a vaporização da água líquida consome aproximadamente 10 kcal/mol, calcule a massa de acetileno deve ser queimada para produzir calor suficiente para vaporizar 210 mols de água líquida e assinale a alternativa correta.

A-)65 g.
B-)130 g.
C-)182 g.
D-)364 g.
E-)600 g.

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