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Asked Nov 21, 2019
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What is the internal energy of 1 L of oxygen gas at room temperature?

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Expert Answer

Step 1

We know,...

Consider the room temperature to be 20°C or 293K
Number of moles of oxygen in 1 liter 0.045 moles
The intemal energy U U (translation) U(rotation, linear)
The O2molecule has three degrees of freedom in translational motion and
two degrees of freedom in rotational motion
We know internal energy per mole is
U = (5/2) RT
U =(2.5)(8.314 47 JK mol 1)(293 K)
= 6.09 x 10 J/ mol
6.09 kJ / mol
U
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Consider the room temperature to be 20°C or 293K Number of moles of oxygen in 1 liter 0.045 moles The intemal energy U U (translation) U(rotation, linear) The O2molecule has three degrees of freedom in translational motion and two degrees of freedom in rotational motion We know internal energy per mole is U = (5/2) RT U =(2.5)(8.314 47 JK mol 1)(293 K) = 6.09 x 10 J/ mol 6.09 kJ / mol U

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