Vanderwaal's constant 'a' has the dimensions of
(A) `mol ^-1`
(B) atm` L^2` mol-2
(C) litre `mol^-1`
(D) atm L mol-2
A C

The values of the van der Waals' constant a for some gases are given below. H_2 = 0.245 " atm " L^2 mol^(-2) O_2 = 1.360 " atm " L^2 mol^(-2) CO_2 = 3.590 " atm " L^2 mol^(-2) NH_3 = 4.170 " atm " L^2 mol^(-2) Arrange these gases in the decreasing order of their liquefaction tendencies.

What is the value if R when its units are L atm K^(-1) mol^(-1) ?

Calculate the pressure exerted by 110 g of carbon dioxide in a vessel of 2 L capacity at 37^(@)C . Given that the van der Waal’s constants are a = 3.59 L^(2) " atm "mol^(-2) and b = 0.0427 L mol^(-1) . Compare the value with the calculated value if the gas were considered as ideal.

What is the density of N_(2) gas at 227^(@)C and 5.00 atm pressure? (R= 0.0821 atm K^(-1)mol^(-1))

Calculate the value of R in : (i) SI units , (II) Cal "degree"^(-1) "mol"^(-1) , (iii) Litre atm K^(-1) "mol"^(-1)

1 mol of C Cl_(4) vapours at 77^(@)C occupies a volume of 35.0 L . If van der Waals constants are a=20.39 L^(2) atm mol^(-2) and b=0.1383 L mol^(-1) , calculate compressibility factor Z under ( a ) Low pressure region ( b ) High pressure region

Under what conditions will a pure sample of an ideal gas not only exhibit a pressure of 1 atm but also a concentration of 1 mol litre^(-1) [R= 0.082 iltre atm mol^(-1)K^(-1)]

Rate constant of a first order reaction is 0.0693" m in"^(-1) . If we start with 20" mol L"^(-1) concentration in what time, it is reduced to 2.5" mol L"^(-1) ?

Calculate the pressure exerted by 0.350 moles of carbon dioxide in 0.360 L container at 100^@C . What pressure will be predicted by ideal gas equation? (a = 3.59 " atm " L^2 mol^(-2), b = 0.0427 L mol^(-1) )

A graph is plotted for a vanderwaal's gas between PV_(m) vs P leading to an intercept of 22.16 litre-atm. The temperature of gas at which these observations of P and V_(m) were made is ___________ ""^(@)C (R = 0.08 " litre atm" K^(-1) mol^(-1))