two flask if capacity 1l and 2l contains gases a and b if densitty of a is 2.5g/l and b is 5g/l and molar mass of a is twice of bthen ratio
Answers
Answer:
According to Kinetic Theory of gases,
PV=
3
1
mnu
2
where, P is pressure of the gas, m is mass of the gas, n is no. of molecules and u is the average speed of the molecules of the gas.
So, for gas present in flask X and Y will have the pressure as follows
P
X
=
3
1
V
X
mn
X
u
X
2
..........................(i)
P
Y
=
3
1
V
Y
mn
Y
u
Y
2
..........................(ii)
According to question,
u
X
=2u
Y
and n
X
=n
Y
(∵1 mole of the gas is present in each flask)
2V
X
=V
Y
Dividing eqn. (i) by (ii),
P
Y
P
X
=
(1/3)n
Y
u
Y
2
V
X
(1/3)n
X
u
X
2
V
Y
=4×2=8
P
X
=8 P
Y
Option D is correct
Answer:
11th
Chemistry
States of Matter
Kinetic Molecular Theory of Gases
Two flasks X and Y have cap...
CHEMISTRY
Two flasks X and Y have capacity 1L and 2L respectively and each of them contains 1 mole of a gas. The temperatures of the flasks are so adjusted that average speed of molecules in X is twice as those in Y. The pressure in flask X would be:
MEDIUM
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ANSWER
According to Kinetic Theory of gases,
PV=
3
1
mnu
2
where, P is pressure of the gas, m is mass of the gas, n is no. of molecules and u is the average speed of the molecules of the gas.
So, for gas present in flask X and Y will have the pressure as follows
P
X
=
3
1
V
X
mn
X
u
X
2
..........................(i)
P
Y
=
3
1
V
Y
mn
Y
u
Y
2
..........................(ii)
According to question,
u
X
=2u
Y
and n
X
=n
Y
(∵1 mole of the gas is present in each flask)
2V
X
=V
Y
Dividing eqn. (i) by (ii),
P
Y
P
X
=
(1/3)n
Y
u
Y
2
V
X
(1/3)n
X
u
X
2
V
Y
=4×2=8
P
X
=8 P
Y