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Unformatted text preview: acity to respond to these prompts.
a) Explain why the number of modes per particle for monatomic gases is less than for hydrogen (H2) at 300
b) Explain why the number of modes per particle increases with increasing temperature for all of the
substances except for the monatomic gases.
c) H2 and N2 are both diatomic molecules with the same number of KErot modes. According to the graph,
which gas must have the greater splitting between energy levels for the vibrational modes, i.e., which has
the greater energy gap between the ground state and the first excited vibrational energy level ?
3.4-2) A certain gas mixture at a temperature of 1000 K consists of two moles of N2 and one mole of CH4. Data
on these gases can be obtained from the graph in Section 3-2 of your textbook.
a) Explain which type of molecule, if either, has a greater average translational KE at 1000 K.
b) Explain how you know which molecule, if either, has the greater number of active modes at 1000 K.
c) Explain which type of molecule, if either, has a greater average rotational KE at 1000 K.
d) Explain which type of molecule, if either, has a greater average translational speed at 1000 K.
e) If you added the same small amount of heat to one mole of N2 and to one mole of CH4, which would you
expect to ha...
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