While the normal gas flame can only produce a “operating” to “light blue” type of flame, the Bunsen burner can at least yield three types of flame. Consequently, the following:
Operating flame – which is yellow/orange in color, near 300° C. ·
Blue flame – can be imperceptible under normal lighting conditions, near 500° C. The typically used laboratory type of flame. ·
Roaring-blue flame – forms a triangular shaped in the center of the flame normally light blue in color and interestingly, it’s a sound-producing flame. Heat is near to 700° C.
Imagine with this three kinds of flame produced and a Bunsen burner creates compared to a simple normal gas flame. In sense, the roaring-blue flame proves evident as to why Bunsen burner is hotter hence, the amount of heat it makes (700°C) it makes.