Question

what can you conclude from the graph?
the reaction that causes a firework to explode requires less energy to start, and occurs more rapidly than the reaction that causes a candle to burn.
the reaction that causes a firework to explode requires less energy to start, and occurs less rapidly than the reaction that causes a candle to burn.
the reaction that causes a firework to explode requires more energy to start, and occurs less rapidly than the reaction that causes a candle to burn.
the reaction that causes a firework to explode requires more energy to start, and occurs more rapidly than the reaction that causes a candle to burn.

Explanation:

Firework explosions are fast - paced and release energy quickly, while candle - burning is a slower process. A reaction that occurs more rapidly will have a steeper decline in the energy - time graph. Also, fireworks generally require a relatively small amount of activation energy to start a large and rapid reaction compared to the more sustained and slower candle - burning reaction.

Answer:

The reaction that causes a firework to explode requires less energy to start, and occurs more rapidly than the reaction that causes a candle to burn.