The vapor pressure of 10 ml of ethanol at 20c is 5.85 kpa. what is the vapor pressure of 20 ml of ethanol at the same temperature?

5.85 kPa

Explanation:

The vapor pressure of a liquid is not affected by the volume. This means it would have the same value it had at 10ml in 20ml also.

Vapor pressure is the pressure caused by the evaporation of liquids. Three common factors that influence vapor press are surface area, intermolecular forces and temperature. The vapor pressure of a molecule differs at different temperatures.  As the temperature increases, the vapor pressure increases.

on passing the small ampere of electric current through the tube made of ar and hg of cfl generates uv rays which excites the fluorescent and thus emits the high radiation by consumption of just 5- 12 w in comparison to incandescent light which requires more power such as around 40 - 55 w to lighten.

moreover the life span of fluorescent or cfl is around 8000 h whereas the life span of incandescent is around 1200 h

hence, the building installed with incandescent lights bears more electricity bill.