Question

or water to be a liquid, its temperature must be within 50 Kelvin of 323 Kelvin. Which equation can be used to determine the minimum and maximum temperatures between which water is a liquid?

|323 – 50| = x
|323 + 50| = x
|x – 323| = 50
|x + 323| = 50

Answer 1

|x − 323| = 50

Solving gives x = 323 ± 50 → x = 273 K and x = 373 K, so the liquid range is 273 K to 373 K.