QBManager

Kinetic Theory of Gases

139070 When a Vander Waal's gas undergoes free expansion then its temperature

1 Decreases

2 Increases

3 Does not change

4 Depends upon the nature of the gas

MP PMT-2009

Kinetic Theory of Gases

138997 Two vessels $A$ and $B$ contain oxygen. The volume of $B$ is twice that of $A$ , the pressure of $B$ is thrice that of $A$ and the temperature of $B$ is half of that of $A$ . Then, find the ratio of number of molecules of oxygen in vessels $A$ and $B$ .
#[Qdiff: Hard, QCat: Numerical Based, examname: AP EAMCET (17.09.2020) Shift-II#

1 : 3

1 : 12

3 : 4

1 : 6

Explanation:

B Given that,
$V_{B} = 2 V$
$P_{B} = 3 P$
$T_{B} = \frac{1}{2} T$
Equation for an ideal gas is given by-
$PV = nRT$
For vessel A:
$n_{A} = \frac{PV}{RT}$
For vessel B:
$n_{B} = \frac{(3 P) \times (2 V)}{R \times \frac{1}{2} T}$
$= \frac{6 PV}{\frac{RT}{2}}$
$n_{B} = \frac{12 PV}{RT}$
On dividing equation (i) by (ii), we get
$\frac{n_{A}}{n_{B}} = \frac{\frac{PV}{RT}}{\frac{12 PV}{RT}}$
$n_{A} : n_{B} = \frac{PV}{12 PV} = \frac{1}{12}$
$n_{A} : n_{B} = 1 : 12$

NEET DIGITAL LIBRARY

Kinetic Theory of Gases

139070 When a Vander Waal's gas undergoes free expansion then its temperature

1 Decreases

2 Increases

3 Does not change

4 Depends upon the nature of the gas

MP PMT-2009

Kinetic Theory of Gases

1 : 3

1 : 12

3 : 4

1 : 6

Explanation:

Join With Us for More Updates