For real gases, van der Waals equation is written as p + a n 2 V 2 ( V - n b ) = n R T where a and b are van der Waals constants two sets of gases are ( I ) O 2 , C O 2 , H 2 and He ( I I ) C H 4 , O

Question

For real gases, van der Waals equation is written as $(p + \frac{a n^{2}}{V^{2}}) (V - n b) = n R T$

where a and b are van der Waals constants two sets of gases are

$(I)$ $O_{2}, C O_{2}, H_{2}$ and He

$(I I)$ $C H_{4}, O_{2}$ and $H_{2}$

The gases given in set-I in increasing order of b and gases given in set-II in decreasing order of a, are arranged below. Select the correct order from the following

TestHub · Accepted Answer

Van der Waals gas constant 'a' represent intermolecular force of attraction of gaseous molecules and Van der Waals gas constant 'b' represent effective size of molecules . Therefore order should be

$(I) H_{2} < H e < O_{2} < C O_{2}, (I I) C H_{4} > O_{2} > H_{2}$

Chemistry - Real Gas Question with Solution | TestHub

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