How come water boils at a temperature below boiling point in hill stations?
How come water boils at a temperature below boiling point in hill stations?
Boiling point(B.P) has many factors, and one of them is the ‘external pressure’ or ‘environmental pressure’. A liquid boils when its internal pressure of bubbles becomes equal to the external or environmental pressure. So, greater the external pressure, higher the B.P. will be.
As you go up, the environmental pressure decreases, because at height less air molecules are present than at the sea level. It’s the gravity that pulls the molecules downwards (closer to the sea level) and, hence the pressure at sea level is greater than the heights’.
Hence, at greater heights, by absorbing less heat energy, the liquid’s internal pressure becomes equal to the external pressure, and it boils earlier (as compared to the sea level). So is the case of pure water.
Boiling point(B.P) has many factors, and one of them is the ‘external pressure’ or ‘environmental pressure’. A liquid boils when its internal pressure of bubbles becomes equal to the external or environmental pressure. So, greater the external pressure, higher the B.P. will be.
As you go up, the environmental pressure decreases, because at height less air molecules are present than at the sea level. It’s the gravity that pulls the molecules downwards (closer to the sea level) and, hence the pressure at sea level is greater than the heights’.
Hence, at greater heights, by absorbing less heat energy, the liquid’s internal pressure becomes equal to the external pressure, and it boils earlier (as compared to the sea level). So is the case of pure water.
