The ratio a/b (the terms used in van der Waal's equation) has the unit

Question

The ratio a/b (the terms used in van der Waal's equation) has the unit, atm litre m o l - 1, atm d m 3 m o l - 1, dyne cm m o l - 1, All of these

MARKS App · Accepted Answer

P + a n 2 v 2 v − n b = n R T The units of 'a' = atm l i t r e 2 m o l - 2 = a t m d m 6 m o l - 2 = d y n e c m 2 m o l - 2 And the untis of 'b' = litre m o l - 1 = m 3 m o l - 1 = c m 3 m o l - 1 Hence, unit of a/b = atm l i t r e 2 m o l - 1 / litre m o l - 1 = a t m l i t r e m o l - 1 Similarly all other units are possible.

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