Q 26,27,28,29,30 2-. A large cylinder for storing gas has of 1.5 W. If is
off 150 at K, how many the
cylinder? What would be the weight of oxygen in such a cylinder? (1 W = 28.32 litres)
5 g of ethane are in a hullo one-litre The b„lb is weak that it will
burst if the pressure exccæds 10 at.nw At what temperature will the pressure of the gas
reach the bursting value?
(Ans = R = 0.0821 lit. atm/k/molel
29. A gas cylinder containing gas can withstand a pressure of 14.9 atm. The
pressure gauge of cylinder indicates 12 atm at '27"C. Due to sudden fire in the building,
its temperature starts rising. At what temperat„re the cylinder will explode?
= 372.5 KI
30. The density of the vapour of a substanee*lt 373 K and 1-013 x PA is 2.55 g/lit.
Calculate its molecular weight.
[Ans = 78 |
A bulb of unknown volume V contains an ideal gas at 1 atm pressure, This bulb was
connected to another evacuatexl bulb of volume litre throught a stopock. When the
stopcock was opened the pressure at each bulb became 530 while tbc temperature
remained constant. Find V in litres.
[Ans = 1.152 litres.'
The volume of gas is 40 mL at NTP_ Find the of the gas if pressure changes
to 800 mm of Hg and temperature remains the same [Ans = 3S mL.l
A gas was allowed to expand from a volume of 0.4 L to '2„0 L at constant temperature.
If the initial pressure was 3 atm. Calculate the new pre•urelAns = 0.6 atm.l
A weather balloon has a volume of 175 L when filled with hydrogen at a pressure oi
1_00 atm. Calculate the volume of the balloon when it rises to a height of 2000 m,
where the atmospheric pressure is OSO atm. Assume that the temperature is constant
[Ans = 218.75 Ll
Volume Of a givea maSS Of gas is 2(HJ at 170C,. What will be volume of gas if th•
temperature changes to 47 oc at the satne pressure. [Ans = 220.6 cmSl
A gas occupies volume V mL at 37"C. At what temperature its volume Will reduce t'
one-fonrth Of its original volume at satne pressure? [Ans —195.500
A sample or helium volume of 501) at 373 K. Calculate the temperature a
which the volume will become 260 cml. Assume the pressure is constan_
IAns - 104 KI
An open vessel at 270C is heated until thre€&fifth of the air in if has been expellex
Assuming that the volume of the vessel constant find the temperature at whir
the vessel has been hcatcd?