Gas Laws and Kinetic Molecular Theory (4B)
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QUESTION
Find
V
2
V_2
V
2
if
V
1
=
4
L
V_1 = 4\ \text{L}
V
1
=
4
L
,
T
1
=
300
K
T_1 = 300\ \text{K}
T
1
=
300
K
, and
T
2
=
450
K
T_2 = 450\ \text{K}
T
2
=
450
K
at constant
P
P
P
.
QUESTION
Find
P
2
P_2
P
2
if
P
1
=
1.5
atm
P_1 = 1.5\ \text{atm}
P
1
=
1.5
atm
,
T
1
=
300
K
T_1 = 300\ \text{K}
T
1
=
300
K
, and
T
2
=
200
K
T_2 = 200\ \text{K}
T
2
=
200
K
at constant
V
V
V
.
QUESTION
Find
n
n
n
if
P
=
2
atm
P = 2\ \text{atm}
P
=
2
atm
,
V
=
5
L
V = 5\ \text{L}
V
=
5
L
,
T
=
300
K
T = 300\ \text{K}
T
=
300
K
, and
R
=
0.082
L atm mol
−
1
K
−
1
R = 0.082\ \text{L atm mol}^{-1}\text{K}^{-1}
R
=
0.082
L atm mol
−
1
K
−
1
.
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ANSWER
n
≈
0.41
mol
n \approx 0.41\ \text{mol}
n
≈
0.41
mol
. Solving the ideal gas law for
n
n
n
gives moles as pressure times volume over
R
R
R
times temperature.
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