A piece of solid carbon dioxide with a mass of 7.47 g, is placed in a 4.00 L oth

Question

A piece of solid carbon dioxide with a mass of 7.47 g, is placed in a 4.00 L otherwise empty container at 23 degrees Celcius. 1) What is the pressure in the container after all the carbon dioxide vaporizes____atm? 2) If 7.47 g solid carbon dioxide were placed in the same container but it already contained air at 740 torr, what would be the partial pressure of carbon dioxide, P CO2? ___ atm 3) What would be the total pressure, P total, in the container after the carbon dioxide vaporizes? ____ atm

Explanation / Answer

1)

mass of CO2 = 7.47 g

moles of CO2 = 7.47 / 44 = 0.1698 mol

volume = 4.00 L

temperature = 23 + 273 = 296 K

P V = n R T

P x 4 = 0.1698 x 0.0821 x 296

P = 1.03 atm

pressure in the container = 1.03 atm

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