2H₂ (aq) + O₂ (g) --> 2H₂0 (g)
When H₂ (g) and O₂ (g) are mixed together in a rigid reaction vessel at 25°C, no reaction occurs. Why does the spark need to be present for the reaction to occur when the gases are originally at 25°C?
a) Activation energy barrier
b) Increased pressure
c) Catalyst effect
d) Endothermic reaction