Advertisements
Advertisements
Question
Calculate the volume of dry air at STP that occupies 28 cm3 at 14°C and 750 mmHg pressure when saturated with water vapour. The vapour pressure of water at 14°C is 12 mmHg.
Advertisements
Solution
Pressure due to dry air,
P = 750 - 12 = 738 mm
V = 28 cm3
T = 14°C = 14 + 273 = 287 K
P1 = 760 mmHg
V1= ?
T1 = 0°C = 273 K
Using gas equation,
`("P" "V")/"T" = ("P"_1 "V"_1)/"T"_1`
`(738xx28)/287 = (760xx"V"_1)/273`
`"V"_1 = 25.9 "cm"^3`
APPEARS IN
RELATED QUESTIONS
Explain Boyle's Law on the basis of the kinetic theory of matter.
Choose the correct answer:
If the pressure is doubled for a fixed mass of a gas, its volume will become
A steel cylinder of internal volume 20 litres is filled with hydrogen at 29 atmospheric pressure. If hydrogen is used to fill a balloon at 1.25 atmospheric pressure at the same temperature, what volume will the gas occupy?
Calculate the volume occupied by 2 g of hydrogen at 27°C and 4-atmosphere pressure if at STP it occupies 22.4 litres.
Give its
(i) mathematical expression
(ii) graphical representation and
(iii) significance.
A given mass of a gas occupied 143 cm3 at 27° C and 700 mm Hg pressure. What will be its volume at 300 K and 280 mm Hg pressure?
Name or state the following:
The law which studies the relationship between pressure of a gas and the volume occupied by it at constant temperature.
State Boyle’s law
State-the law of volume
Calculate the coefficient of cubical expansion of a zinc bar. Whose volume is increased 0.25 m3 from 0.3 m3 due to the change in its temperature of 50K?
