3. Consider the reaction of methane, CH4, burning in the presence of oxygen at constant pressure. Given the following equation, how much heat could be obtained by the combustion of 8.0 grams CH4? Given the thermochemical equation: CH4(g)+2O2→CO2(g)+2H2O(l); ΔH0=890.3kJ;

445.15 kJ of heat could be obtained by the combustion of 8.0 grams

Explanation:

To calculate the moles :

The given thermochemical equation is:

According to stoichiometry :

1 mole of on combustion produce heat = 890.3 kJ

Thus 0.50 moles of on combustion produce heat =

Thus 445.15 kJ of heat could be obtained by the combustion of 8.0 grams