Question

87 cc of moist nitrogen is measured at 9 degrees Celsius and 659 mm Hg pressure. find the volume of dry nitrogen at S.T.P The vapour pressure of water at 9 degrees Celsius is 9 mm Hg.

Answer 1

Answer:

Trees also cool the air by a process known as 'transpiration cooling'. As trees release water into the atmosphere from their leaves via transpiration, the surrounding air is cooled as water goes from liquid to a vapor. ... The water that is released in its gas vapor form has a cooling effect on the surrounding air.

Answer 2

Pressure due to dry nitrogen alone

= 659-9= 650 mm Hg

P1 = 650 mm

V1= 87 cm3

T1= 273+9

= 282 K

P2= 760 mm

V2=?

T2=273K

By the gas equation,

P1 V1 = P2 V2

T1 T2

Substituting the values,

650 x 87/ 282 = 760 x V2/ 273

V2= 650 x 87 x 273 /282 x 760

V2= 72.03 cm3

The volume of dry nitrogen at STP would be 72.03 cm3.