Consider isotherms I, II and III in the figure.
Select the correct statement.
Consider isotherms I, II and III in the figure.
Select the correct statement.
The correct option is D All the statements are correct.
We have already seen that isotherm I is obtained for gases like H2 and He. The attractive forces are never significant enough to cause compression factor to deviate negatively (Z < 1).That is Z > 1 for H2 and He.
Because of appreciable attractive forces (intermolecular) Z decreases until points B and C respectively in isotherms II and III.
As the pressure increases the molecules come closer and closer. At one point, they are extremely closely packed that they start repelling each other (like charge phenomena).
When co-volume is neglected, isotherms II and III are followed A to B or A to C is correct when pressure is not very high. In this case the volume occupied by the atoms is insignificant compared to the volume occupied by the gas (macroscopic)
All the statements are correct.
We have already seen that isotherm I is obtained for gases like H2 and He. The attractive forces are never significant enough to cause compression factor to deviate negatively (Z < 1).That is Z > 1 for H2 and He.
Because of appreciable attractive forces (intermolecular) Z decreases until points B and C respectively in isotherms II and III.
As the pressure increases the molecules come closer and closer. At one point, they are extremely closely packed that they start repelling each other (like charge phenomena).
When co-volume is neglected, isotherms II and III are followed A to B or A to C is correct when pressure is not very high. In this case the volume occupied by the atoms is insignificant compared to the volume occupied by the gas (macroscopic)
