The boiling point of water at sea level is 100 °C. At higher altitudes, the boiling point of water will be
A)lower, because temperatures are lower.
B)lower, because the atmospheric pressure is lower.
C)higher, because the altitude is greater.
D)higher, because there are fewer water molecules in the air.
E)the same, because water always boils at 100 °C.

Question

Quizplus · Accepted Answer

The boiling point of water is dependent on atmospheric pressure, and as altitude increases, atmospheric pressure decreases. Therefore, the boiling point of water at higher altitudes will be lower than 100°C.

The Boiling Point of Water at Sea Level Is 100