The behavior of real gases can be described using the van der Waals equation [P

Question

The behavior of real gases can be described using the van der Waals equation

[P + (n2a/V2)](V-nb) = nRT

The values of a and b are given below for the two real gases neon and methane.

The gas in which deviations from ideal behavior due to intermolecular forces are expected to be the smallestis _________.

neon or methane?

The gas that would be expected to behave least like an ideal gas at high pressures is _________.

neon or methane?

gas

a (L2atm/mol2)

b (L/mol)

Ne

0.211

1.71×10-2

CH4

2.25

4.28×10-2

gas

a (L2atm/mol2)

b (L/mol)

Ne

0.211

1.71×10-2

CH4

2.25

4.28×10-2

Explanation / Answer

1) answer : methane

largest a value gas deviates most due to intermolecular forces. if a value is more intermolecular forces aslo more from above equation n^2 a / v^2

2) answer : methane

smallest b value gas behave most ideally . so b value is highest for methane it is least ideal at high pressure

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