temperature

Question

matter is in a liquid state when temperature is between the melting point and it's boiling point.suppose that some substance has a melting point of -32.91C and a boiling point of 315.72C. what is the range of temperatures in degrees Fahrenheit for which this substance is not in a liquid state?(hint:c=5/9(F-32)) express the range as an inequality and in interval notation.
let x represent the temperature in degrees Fahrenheit. what is the range of temperatures for which this substance is not in a liquid state?

Answer 1

if C = 5/9(F - 32) then F = 9/5(C + 32)

 

plug C in and compute the values of F and let's say the lower value is X and the upper value is Y. Then you would have the substance is solid below X and gaseous above Y, or F< X, F> Y.