Question

Van der walls equation is an equation of state that generalizes the ideal gas law

based on plausible reasons that real gases do not act ideally. The equation is

given as;

ቀ +



ଶ

ቁ ( − ) =

This equation is valid for real gases. Here ‘a’ is the correction for intermolecular

forces and

‘b’ is the correction for the size of molecules. In this equation:

1. The quantity (a/V2) has theunit

(a) N/m (b) N/m2 (c) J/m (d)J/m2 2. The unit of the quantity (b-a)is

(a) N/s (b)J/s (c) unitless (d) cannot befound

3. The constant ‘a’ has the dimensionalformula

(a) ML2T-2

(b) ML5T-2 (c) ML-2T2

(d)ML3T-2

4. The dimensional formula for (a/b) is same as thatof

(a) Pressure (b)force (c) work (d)momentum

5. The dimensional formula for Ris

(a) ML2T-1molK (b)ML2T-3molK.

(c) ML2T-2mol-1K-1 (d)ML3T-3 mol-1K-1​

Answer 1

Answer:

Van der walls equation is an equation of state that generalizes the ideal gas law

based on plausible reasons that real gases do not act ideally. The equation is

given as;

ቀ +

ଶ

ቁ ( − ) =

This equation is valid for real gases. Here ‘a’ is the correction for intermolecular

forces and

‘b’ is the correction for the size of molecules. In this equation:

1. The quantity (a/V2) has theunit

(a) N/m (b) N/m2 (c) J/m (d)J/m2 2. The unit of the quantity (b-a)is

(a) N/s (b)J/s (c) unitless (d) cannot befound

3. The constant ‘a’ has the dimensionalformula

(a) ML2T-2

(b) ML5T-2 (c) ML-2T2

(d)ML3T-2

4. The dimensional formula for (a/b) is same as thatof

(a) Pressure (b)force (c) work (d)momentum

5. The dimensional formula for Ris

(a) ML2T-1molK (b)ML2T-3molK.

(c) ML2T-2mol-1K-1 (d)ML3T-3 mol-1K-1