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  • Consider the vander waals constants a and b for the following gases ___ Gas Ar</

Consider the vander waals constants a and b for the following gases ___

Gas Ar Ne Kr Xe
a 1.3 0.2 5.1 4.1
b 3.2 1.7 1.0 5.0

Which gas is expected to have the highest critical temperature ?

 

Option: 1

Kr


Option: 2

Xe


Option: 3

Ar


Option: 4

Ne


Answers (1)

best_answer

Critical temperature is the temperature of a gas above which it cannot be liquified whatever high the pressure may be.The KE of gas molecules above this temperature is sufficient enough to overcome the attractive forces .It is represented as T_{c}

\mathrm{T_c=\frac{8 a}{27 \mathrm{Rb}}}

\mathrm{for \: An, T_c=\frac{8 \times 1.3}{27 \times 8.314 \times 3.2}=0.0144}

\mathrm{for\; NC, T_c=\frac{8 \times 0.2}{27 \times 8.314 \times 1.7}=0.0041}

\mathrm{for \; kr, T_C=\frac{8 \times 5.1}{27 \times 8.314 \times 1.0}=0.18}

\mathrm{for\; Xe, T_C=\frac{8 \times 4.1}{27 \times 8.314 \times 5.0}=0.02}

The value of \mathrm{ T_C} is highest for Kr

Posted by

vishal kumar

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