8. Oxygen at pressures that are not too high obeys the equation P(V - b) = RT, Where P is pressure; V is volume, R is 8.314 JK-1mol-¹, T is temperature, b =0.021dm³/mol, Estimate the fugacity of oxygen at 25°C and 1 bar pressure. [Hint: The equation of state is Where P1 is 0 bar] (A) (B) (C)(D) (E)