Question

For $H _{2} O$

$T _{ C }=647 K$

$P_{C}=218$ atm

$V_{C}=0.057 L mol ^{-1}$

What is the value of 'a' for $H _{2} O ?$

• A. $2.12 L ^{2} \,atm \,mol ^{-2}$
• B. $0.019 \,L ^{2} \,atm \,mol ^{-2}$
• C. $8.31 \,L ^{2}\, atm \,mol ^{-2}$
• D. $0.082\, L ^{2}\, atm \,mol ^{-2}$

Answer 1

Answer: (A)

$a =3 p _{ C } V _{ C }^{2}$

$=3 \times 218 \times(0.057)^{2}$

$=2.12 L ^{2} atm\, mol ^{-2}$