Answer :
Therefore, the atomicity of the gas is 3.5
Given:
Cp = 27.5 J. mol⁻¹.K⁻¹Cv = 35.8 J. mol⁻¹.K⁻¹We know that, Cp – Cv = R
Where, R is gas constant for the given gas.
So, R = Cp – Cv
Put the values of Cp and Cv,
we getR = 27.5 J. mol⁻¹.K⁻¹ – 35.8 J. mol⁻¹.K⁻¹= -8.3 J. mol⁻¹.K⁻¹
For monoatomic gas, degree of freedom (f) = 3
And, for diatomic gas, degree of freedom (f) = 5
Now, we know that atomicity of gas (n) is given by,
n = (f + 2)/2
For the given gas,
n = (f + 2)/2 = (5+2)/2 = 3.5
Therefore, the atomicity of the gas is 3.5.We found the value of R for the given gas using the formula Cp – Cv = R. After that, we applied the formula of atomicity of gas to find its value.
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