How hot is the fire from a dragon?

Answer 1

The fire from a dragon can get as hot as 1000 degrees which is about the same as an open campfire. Silver has a melting point of 962 degrees and one would think that a dragon's fire could definitely melt silver so 1000 degrees it not out of the question.

The temperature of a dragon's fire is dependent on what type of oxidizing agent it uses for its fiery breath (different types of fire dragons do indeed use different oxidizing agents. It is how they are classified). The ancestral Sore dragons included poisons of many types in their aerosol breath, some of which were acids. Some of these acid-poisons are so oxidative that they do indeed burst into flame on employment. From such 'happy accidents' the true fire-breathing traits did evolve. Later dragons skipped the acid stage of their oxidative poisons and instead simply employed the basal oxidizer of the more common acids: I2, Br2, Cl2, O2, and F2. (no subscript anymore eh?) Some then evolved to employ the higher oxidized states of acid bases to include an extra kick, harder explosives power, and even higher temperatures: NO2, N2O4, SO3, ClO4, FO2. F2O2, F2O3. The latter of this group have very hot flames indeed, achieving Violet-white coloured flames of unmeasured temperature. It is chemically possible for such dragons to burn pure stone, glass, tungsten, or virtually anything for that matter. (the author cannot help but to warn readers away from small fancifully coloured dragons that compose these latter groups. They are extremely dangerous.)