Tardigrade
Tardigrade - CET NEET JEE Exam App
Exams
Login
Signup
Tardigrade
Question
Chemistry
Which is the incorrect statement for 1 L sample of N2(.g.) and CO2(.g.) at 298 K and 1 atm pressure
Q. Which is the incorrect statement for
1
L
sample of
N
2
(
g
)
and
C
O
2
(
g
)
at
298
K
and
1
a
t
m
pressure
2020
217
NTA Abhyas
NTA Abhyas 2020
States of Matter
Report Error
A
The average translational
K
E
per molecule is the same in
N
2
and
C
O
2
B
The rms speed remains same for both
N
2
and
C
O
2
C
The density of
N
2
is less than that of
C
O
2
D
The most probable velocity is different for the two gases.
Solution:
Kinetic energies per molecule will be same because it is proportional to absolute temperature only.
d
C
O
2
d
N
2
=
M
C
O
2
M
N
2
=
44
28
i.e.,
d
N
2
<
d
C
O
2
.
Total translational kinetic energy will also be same because at same temperature & pressure number of molecules present in same volume would be same (according to Avogadro's Law)
Hint : rms speed has relation,
U
O
2
U
S
O
2
=
M
S
O
2
T
O
2
M
O
2
T
S
O
2