Question

The units of constant ' $a$ ' in van der Waal's equation is

• A. dm ${}^6$ atm mol mol ${}^{-2}$
• B. dm ${}^3$ atm mol ${}^{-1}$
• C. dm atm mol ${}^{-1}$
• D. atm mol ${}^{-1}$

Answer 1

Answer: (A)

Unit of $P\equiv \frac{n^{2}a}{V^2};a\equiv \frac{P{V}^2}{n^2}=$ atm dm${}^{6}mo{l}^{-2}$