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Byju's Answer
Standard XII
Physics
Ideal Gas Equation from KTG
Consider the ...
Question
Consider the quantity
M
k
T
p
V
of an ideal gas where M is the mass of the gas. It depends on the
(a) temperature of the gas
(b) volume of the gas
(c) pressure of the gas
(d) nature of the gas.
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Solution
In
an
ideal
gas
,
the
equation
of
state
is
given
by
P
V
=
n
R
T
⇒
P
V
=
n
N
A
R
N
A
T
⇒
P
V
=
n
N
A
k
T
⇒
1
n
N
A
=
k
T
P
V
Multiplying
both
sides
by
mass
of
the
gas
M
,
we
get
M
n
N
A
=
M
k
T
P
V
Now
,
n
N
A
gives
the
total
number
of
molecules
of
the
gas
.
Also
,
M
n
N
A
gives
the
mass
of
a
single
molecule
.
Hence
,
M
k
T
P
V
is
the
mass
of
a
single
molecule
of
the
gas
,
Molecular
mass
is
a
property
of
the
gas
.
Thus, (d) is the correct answer.
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Standard XII Physics
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