Question

if the atmospheric pressure lowers what affect does it have on the boiling point

Answer 1

Answer:

When the atmospheric pressure is lowers then  the boiling point is also lower

Explanation:

The boiling point is reached when the vapor pressure of a liquid matches the atmospheric pressure. Raising the atmospheric pressure will raise the boiling point. Conversely, lowering the atmospheric pressure will lower the boiling point of the liquid.

This phenomena is due to the fact that the vapor pressure of water is temperature dependent. It is raised as temperature increases, and is lowered as temperature drops.

As temperature increases, more particles have enough energy to escape to the gas phase. This increases the vapour pressure. When the vapour pressure equals atmospheric pressure, the liquid boils.

If the atmospheric pressure is lower, the vapour pressure of the liquid needs to be lower to reach boiling point. Therefore, less heat is required to make the vapour pressure equal to the atmospheric pressure hence the boiling point is lowers