What is the pressure in the container?
36 g of a compound is placed into an evacuated 3.00 liter container. When it is heated to 80 degree Celsius, it turns into gas. (Molecular weight of the compound is 72)
We use the ideal gas law here. PV = nRT, where P is pressure, V is volume, n is number of moles, R is the gas constant, and T is temperature. When the compound is converted to a gas, and we assume the gas to show properties of an ideal gas it exerts a pressure according to the ideal gas law.
Now we are given
V = 3.00 liters
n = 36 / 72 = 0.5 mol
R = 0.0821 l*atm / (mol*K)
T = 273 + 80 = 353 K
Using the values given to us in the Ideal Gas Law:
P = nRT/V
=> P = 0.5 mol x 0.0821 l*atm/ (mol*K) x 353 K / 3.00 liter
P = 4.830 atm
The pressure created due to the compound converting to a gas at 80 degree Celsius is 4.830 atm.