Recall: The total kinetic energy of an ideal gas is given by:
where n = total moles of gas, R = universal gas constant (8.314 J/mol K), T = temperature.
Assuming that methane and argon behave ideally in the mixture, this means that we just need to determine the total moles of gases present.
The molar mass of argon is 39.95 g/mol. The moles of Ar present in the mixture is:
A 100.-L flask contains a mixture of methane (CH4) and argon gases at 25°C. The mass of argon present is 228 g and the mole fraction of methane in the mixture is 0.650. Calculate the total kinetic energy of the gaseous mixture.
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Our data indicates that this problem or a close variation was asked in Chemistry: An Atoms First Approach - Zumdahl 2nd Edition. You can also practice Chemistry: An Atoms First Approach - Zumdahl 2nd Edition practice problems.