For real gases van der Waals equation is written as (P +(an2/V2))(V -nb) = nRT where, 'a' and 'b' are van der Waals constants. Set of the gases is O2, CO2, H2 and He. The gases given in set in decreasing order of b arranged below. Select the correct order from the following.

Question

For real gases van der Waals equation is written as (P +(an2/V2))(V -nb) = nRT where, 'a' and 'b' are van der Waals constants. Set of the gases is O2, CO2, H2 and He. The gases given in set in decreasing order of b arranged below. Select the correct order from the following. (A) He > H2 > CO2 > O2 (B) O2 > He > H2 > CO2 (C) H2 > He > O2 > CO2 (D) CO2 > O2 > He > H2

Tardigrade Admin · Accepted Answer

van der Waals gas constant 'b' represents effective size of molecules. Therefore, order should be CO2 > O2 > He > H2

$He > H_{2} > C O_{2} > O_{2}$

$O_{2} > He > H_{2} > C O_{2}$

$H_{2} > He > O_{2} > C O_{2}$

$C O_{2} > O_{2} > He > H_{2}$

van der Waals gas constant 'b' represents effective size of molecules. Therefore, order should be $C O_{2} > O_{2} > He > H_{2}$

Q. For real gases van der Waals equation is written as (P+V2an2​)(V−nb)=nRT where, ′a′ and ′b′ are van der Waals constants. Set of the gases is O2​,CO2​,H2​ and He. The gases given in set in decreasing order of b arranged below. Select the correct order from the following.

He>H2​>CO2​>O2​

O2​>He>H2​>CO2​

H2​>He>O2​>CO2​

CO2​>O2​>He>H2​

van der Waals gas constant 'b' represents effective size of molecules. Therefore, order should be CO2​>O2​>He>H2​

$He > H_{2} > C O_{2} > O_{2}$

$O_{2} > He > H_{2} > C O_{2}$

$H_{2} > He > O_{2} > C O_{2}$

$C O_{2} > O_{2} > He > H_{2}$

van der Waals gas constant 'b' represents effective size of molecules. Therefore, order should be $C O_{2} > O_{2} > He > H_{2}$