Scelta multipla
Under which of the following conditions would a gas that typically behaves non-ideally be made to act more like an ideal gas?
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7. Gases
The Ideal Gas Law Applications
Scelta multipla
A 2 L container will hold about 4 g of which of the following gases at 0°C and 1 atm?
A
CO2
B
O2
C
N2
D
He
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Identify the problem: We need to determine which gas among CO\_2, O\_2, N\_2, and He will have a mass of about 4 g when contained in a 2 L container at 0°C and 1 atm.
Recall the Ideal Gas Law: \(P V = n R T\), where \(P\) is pressure, \(V\) is volume, \(n\) is moles, \(R\) is the ideal gas constant, and \(T\) is temperature in Kelvin.
Calculate the number of moles of gas in the container using the Ideal Gas Law. Convert temperature to Kelvin: \(T = 0 + 273.15 = 273.15\) K. Use \(P = 1\) atm, \(V = 2\) L, and \(R = 0.0821\) L·atm/(mol·K). Then, \(n = \frac{P V}{R T}\).
Determine the molar mass of each gas: CO\_2 (44 g/mol), O\_2 (32 g/mol), N\_2 (28 g/mol), He (4 g/mol).
Calculate the mass of each gas in the container by multiplying the number of moles \(n\) by the molar mass of each gas. The gas whose calculated mass is closest to 4 g is the correct answer.
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