Two different gases are stored in separate closed containers. If both gases have a temperature of 50°C, which statement is true?

At the same temperature, gas molecules have the same average kinetic energy, regardless of which gas they are. Temperature measures the average kinetic energy of the particles, so both gases at 50°C have equal average kinetic energy. This does not mean their total thermal energies must be the same, since that also depends on how much gas is present and other factors.

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