Answer:
We can use the ideal gas law to solve for the temperature of the gas:
PV = nRT
where P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant, and T is the temperature in Kelvin.
R = 8.31 J/(mol K) is the ideal gas constant.
First, we need to convert the pressure from kPa to Pa:
P = 142.01 kPa = 142,010 Pa
Next, we can solve for T:
T = PV/nR
T = (142010 Pa)(3.09 L)/(2.14 mol)(8.31 J/(mol K))
T = 229 K
Therefore, the temperature of the gas is 229 K.