Advertisements
Advertisements
प्रश्न
22.4 litres of gas weighs 70 g at STP. Calculate the weight of the gas if it occupies a volume of 20 litres at 27°C and 700 mmHg of pressure.
उत्तर
Step 1:
V1 = 20 litres
P1 = 700 mm
T1 = 300 K
V2= ?
T2 = 273 K
P2 = 760 mm
`("P"_1 "V"_1)/"T"_1 = ("P"_2 "V"_2)/"T"_2`
`(700xx20)/300 = (760xx"V"_2)/273`
`"V"_2 = (91xx7)/76 = 637/38 = 16.76` litres
Step 2:
22.4 litres of the gas at STP weighs = 70 g
16.76 litres of the gas has weight at STP =
`(70xx16.76)/22.4 = 52.38` g
APPEARS IN
संबंधित प्रश्न
Explain Boyle's Law on the basis of the kinetic theory of matter.
Calculate the volume occupied by 2 g of hydrogen at 27°C and 4-atmosphere pressure if at STP it occupies 22.4 litres.
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.
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?
A gas cylinder having a capacity of 20 litres contains a gas at 100 atmos. How many flasks of 200 cm3 capacity can be filled from it at 1 atmos. pressure if the temperature remains constant?
Calculate the volume of a gas ‘A’ at s.t.p., if at 37°C and 775 mm of mercury pressure, it occupies a volume of `9 1/2` litres.
Assuming temperature remaining constant calculate the pressure of the gas in the following:
The pressure of a gas having volume 100 lits. originally occupying 75 dm3 at 700 mm. pressure.
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?
