At the same temperature, how does the internal energy of 1 mole of helium gas co

Question

At the same temperature, how does the internal energy of 1 mole of helium gas compare with the internal energy of 1 mole of argon gas? (Select all that apply.) They are the same, partly because both contain the same number of atoms. They are the same, partly because the average speed of the argon atoms and of the helium atoms are equal. The argon has more internal energy, partly because its atomic mass and therefore its average kinetic energy is greater. The helium has more internal energy, partly because the average speed of its atoms is greater. Although the helium atoms have a smaller mass m, they move faster, and have more internal energy because 1/2 mv^2 depends linearly on the mass but quadratically on the speed. They are the same, partly because both have the same average kinetic energy per atom. Use the worked example above to help you solve this problem. A cylinder contains 2.05 mol of helium gas at 17.5 degree C. Assume that the helium behaves like an ideal gas. Find the total internal energy of the system. _____ J What is the overage kinetic energy per molecule? _______________ J How much energy would have to be added to the system to double the rms speed? The molar mass of helium is 4.00 times 10^-3 kg/mol. __________________ J The temperature of 2.00 moles of argon gas is lowered from 2.90 times 10^2 K to 2.30 time 10^2 K. Find the change in the internal energy, delta U, of the gas. ________________ J Find the change in the average kinetic energy per atom. ________________ J

Explanation / Answer

1)

Internal energy only dpends on average kinetic energy of atoms

since they have same no of moles

since argon and neon are mono atomic gases so their aerage kinetic energy is same

ANSWER

first and last options

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