The average number of degree of freedom of an ideal gas molecule is six. The gas absorbs 120J of heat at constant pressure. Find the increase in internal energy of gas. - Zigya
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The average number of degree of freedom of an ideal gas molecule is six. The gas absorbs 120J of heat at constant pressure. Find the increase in internal energy of gas.


The number of degree of freedom of gas is,

                             f = 6 

Therefore the value of y of gas  is,

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When the gas is heated at constant pressure, the fraction of heat converted into energy is space space 1 over y. 

Thus, 

space space space space space space space space space space space space space space space fraction numerator increment straight U over denominator straight Q end fraction equals 1 over straight y space

rightwards double arrow space space space space space space space space space space space space space increment straight U equals straight Q over straight y equals fraction numerator 120 over denominator 4 divided by 3 end fraction equals 90 straight J

 

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