Somehow your units seem odd.
Temperature and quantity of potassium seems strange.
Potassium is a metal, somewhat like Sodium. It has a melting point of 63.25°C, and a boiling point of 760°C. Like Sodium, pure Potassium Metal will burn in contact with water.
However, it is often found in an ionic compound for example Potassium Chloride (KCl) which is far less reactive.
KCl salt is soluble in water, and will decrease the melting point and increase the boiling point of the water.
bromide
280 degrees Fahrenheit = 137.78 degrees Celsius
36 degrees Fahrenheit = 2.22 degrees Celsius
3 degrees Celsius = 37.4 degrees Fahrenheit
72 degrees Fahrenheit = 22.22 degrees Celsius
Calcium at 860 degrees celsius potassium melts at a mere 65 degrees celsius
bromide
It is about 734.4 degrees Celsius
blue
48g
potassium has melted by time it reaches 20 degrees.
Aproximately 4 grams of potassium chlorate will dissolve in 50 g of water at 20 degrees celsius.
Potassium nitrate is a solid at 60 oC.
360 degrees Fahrenheit = 182.2 degrees Celsius
7.7777 degrees Celsius.
-12.22 degrees Celsius.
37.6 degrees Celsius = 99.68 degrees Fahrenheit