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
1 degree Celsius is equal to 1.8 degrees Fahrenheit. 4 degrees Celsius is equal to 7.2 degrees Fahrenheit.
The melting point of potassium bromide is 734 degrees Celsius.
Potassium is a solid metal at room temperature and remains solid up to its melting point of 63.25 degrees Celsius. At 100 degrees Celsius, potassium would be in its liquid state.
potassium has melted by time it reaches 20 degrees.
Calcium at 860 degrees celsius potassium melts at a mere 65 degrees celsius
The solubility of potassium chloride at 25 degrees Celsius is approximately 34 grams per 100 grams of water.
bromide
48g
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.
45 degrees Fahrenheit = 7.2 degrees Celsius
5 degrees Celsius = 41 degrees Fahrenheit
37.6 degrees Celsius = 99.68 degrees Fahrenheit