Problems and exercisesConcept of Chemical Reaction
1. Energy balance
In a reaction, 400 kJ must be supplied to break the bonds of the reactants and 500 kJ are released when those of the products form. Is it favourable? How much energy is released?
2. Favourable but slow
The combustion of methane is very favourable. Why does the gas in a kitchen not burn by itself when it mixes with air?