Question

The boiling point of a substance in City A is found to be 145 °C. The boiling point of the same substance in City B is 141 °C. Which city, A or B, is at a higher elevation? How do you know?

Answer 1

City B. Boiling point decreases as you get further from sea level. The altitude is higher and thus the pressure is higher. This cause the boiling point to be lowered.