Question

enthalpy of combustion of the reaction ch, (g)+02(g) → co, (g)+h2o(g) is -890 kj/mol. calculate the how much heat is released when 25.0 g of methane is combusted. (a) -1390.6 kj (b) +1390.6 kj (c) -890 kj (d) +890 kj

Answer 1

Explanation:

Number of moles of methane burnt =

16

3.2

=0.2

Enthalpy of combustion of 1 mole =890 kJ/mol

Heat liberated = 890×0.2=178 kJ