At low pressure, the van der Waals' equation is reduced to

Question

At low pressure, the van der Waals' equation is reduced to, Z = PV m RT = 1 − aP RT, Z = PV m RT = 1 + bP RT, PV m = RT, Z = PV m RT = 1 − a V m RT

MARKS App · Accepted Answer

Van der Waals' equation (at low pressure), P + a V 2 V − b = RT at low pressure V m will be high ∴ b can be neglected P + a V m 2 V m = RT PV m = RT − a V m ∴ Z = PV m RT = 1 − a V m RT

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