What is the correction tems in the pressure for real gas in comparison to the ideal gas ?

Options

A. `n^2/V^2`
B. `(aV^2)/n^2`
C. `(an^2)/V^2`
D. `(an^2)/V-nb`

Answer

C

Explanation

According to ideal gas equation ,
PV=nRT
Since, `P_"observed" lt P_"ideal"`, a correction term is added to observed pressure which are introduced by vander waal.
Ideal pressure `P_i` = Observed pressure or real pressure + Correction term
`P_i=P_r+p`
Since , `p alpha (n/V)^2`
`p=(an^2)/V^2`
a-Vander waal constant
n-number of moles of real gas
V-Volume of the gas
`rArr P_i=P_r + (an^2)/v^2`
Ideal gas equation is modified as ,
`therefore` Correction term in pressure for real gas is `(an^2)/V^2`
`(P+(an^2)/v^2) (V-nb) = nRT`