A cylinder contains 215 mol of helium gas at 225degc assume, Ask an Expert

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A cylinder contains 2.15 mol of helium gas at 22.5°C. Assume that the helium behaves like an ideal gas.

(a) Find the total internal energy of the system.

(b) What is the average kinetic energy per molecule?

(c) How much energy would have to be added to the system to double the rms speed? The molar mass of helium is 4.00 10-3 kg/mol. I solved A and B, can't figure out C The temperature of 4.00 moles of argon gas is lowered from 2.60 102 K to 1.90 102 K.

(d) Find the change in the internal energy, ?U, of the gas. J

(e) Find the change in the average kinetic energy per atom. .

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