Temperature is a measure of the average kinetic energy of a gas?

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Why do they say temperature is a measure of average kinetic energy how is this possible. how can we take it is it applicable for all types of gases?
 

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how can we take it is it applicable for all types of gases?
Apparently all types of gases behave very similarly -- almost like an ideal gas .

For such an ideal gas one can derive velocity distributions ##\Rightarrow## kinetic energy distributions that have a parameter ##T##. And that parameter ##T## we call the temperature.
 
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Why do they say temperature is a measure of average kinetic energy how is this possible. how can we take it is it applicable for all types of gases?
It is not applicable for all types of gasses. It is only applicable for ideal monoatomic gasses. For other gasses thermal energy involves other forms of internal energy
 
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other forms of internal energy
What are the other forms of internal energy taken here?
 
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What are the other forms of internal energy taken here?
Rotational, vibrational, electronic, etc.
 
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