Question
Asked Dec 3, 2019
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A gas at 569 mmHg and 44.0°C occupies a volume of 6.18 L. Calculate its volume at STP.

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Expert Answer

Step 1

All matter can be classified as solid, liquid and gases mainly. In these physical states of matter, the solid state is composed of particles with least intermolecular distance and strongest intermolecular force of attraction. On the contrary, the gaseous state of matter is composed of particles with largest intermolecular distance and weakest intermolecular force of attraction.

Step 2

The gaseous state is the state of matter with least intermolecular force of attraction between molecules and highest kinetic energy. The standard properties of gases like Pressure, volume, and temperature can be calculated with the help of ideal gas equation.

The ideal gas equation can be written as:

P x V
n x R x T
Here:
P Pressure
V volume
T temperature
R gas constant
n moles of gas
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P x V n x R x T Here: P Pressure V volume T temperature R gas constant n moles of gas

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Step 3

Calculate moles of gas:

Pressure = 569 mmHg  = 0.749  atm ( 1 atm = 760 mmHg...

P x V
nx R x T
0.749 atm x 6.18 L = n x 0.0821 L.atm/K.mol x 317 K
0.749 atm x 6.18 L
0.0821 L.atm/K.mol x 317 K
n 0.178moles
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P x V nx R x T 0.749 atm x 6.18 L = n x 0.0821 L.atm/K.mol x 317 K 0.749 atm x 6.18 L 0.0821 L.atm/K.mol x 317 K n 0.178moles

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Chemistry

Ideal gases

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