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in which of the following gas, vibrational mode is excited at room temperature chlorine hydrogen oxygen nitrogen

in which of the following gas, vibrational mode is excited at room temperature
chlorine
hydrogen
oxygen 
nitrogen

Grade:12th pass

2 Answers

ROSHAN MUJEEB
askIITians Faculty 833 Points
3 years ago
Chlorine because , it is the least stable at higher temperature
Vikas TU
14149 Points
3 years ago
Note that the diatomic gas does not have a heat capacity of 72R as you would expect if rotation about its axis or vibration along its axis were involved in storing energy. The reason is that these modes are quantized - and that the thermal energies are insufficient to excite a reasonable fraction of the molecules into the higher energy state. Thus the assumptions that go into the equipartition principle don't apply - and the heat capacity reflects that.

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