in a cyclinder CO2 gas is filled with 20°C temp and 720mmhg pressure. when pressure is 770 mmHg find out temp of gas
Answers
Answer:
You use the Ideal Gas Law.
Explanation:
You also need the volume.
Then, you insert the pressure, volume, and temperature into the expression and calculate the number of moles.
The Ideal Gas Law is
¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯
∣
∣
a
a
p
V
=
n
R
T
a
a
∣
∣
−−−−−−−−−−−−−−−
We can rearrange this formula to get the number of moles,
n
.
n
=
p
V
R
T
EXAMPLE
A 3.00 L container is filled with neon gas at 770 mmHg and 27 °C. How many moles of neon are present?
Solution
Step 1. List the information given, making conversions as necessary.
p
=
770
mmHg
×
1 atm
760
mmHg
=
1.013 atm
V
=
3.00 L
R
=
0.082 06 L⋅atm⋅K
-1
mol
-1
T
=
(30 + 273.15) K = 303.15 K
Step 2. Calculate the number of moles.
n
=
1.013
atm
×
3.00
L
0.082 06
L⋅atm⋅K
-1
mol
-1
×
300.15
K
=
0.123 mol
There are 0.123 mol of neon in the container.