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)
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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.
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