For this question, we will be using the Ideal gas Law formula, which is the following:
PV = nRT
Where:
P = pressure
V = volume
n = number of moles
R = constant of gases
T = temperature
We have:
P = 1.95 kPa or 0.019 atm
V = 12.30 L
n = 0.654 moles
R = 0.082 (this is an experimental value)
T = ?
Now we add these values into our formula:
0.019 * 12.30 = 0.654 * 0.082 * T
0.2337 = 0.0536T
T = 4.36 K