The graph below compares the rates of reaction of a burning candle and an exploding firework.

comparing chemical reactions
a graph has time on the horizontal axis and concentration of reactants on the vertical axis. for an exploding firework, the concentration starts high, increases slightly and then decreases rapidly. for a burning candle the concentration starts high, increases more than the firework, and then decreases rapidly. the concentration for the burning candle is higher than the firework at all timepoints.

what can you conclude from the graph?

answer: the statements that hold true for the exploding firework and a burning candle are:

the reaction of an exploding firework occurs at a faster rate than a burning candle. the reaction occurs at a very fast rate leading to a build up of the gases at the core of the firework. this build up leads to the explosion to release all the gases into the atmosphere.

the activation energy required for an exploding firework is less than the activation energy required for a burning candle. the firework requires only a small flame or a spark to quickly ignite it whereas a full flame is required to light a candle.

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