What is the compressibility factor(Z)?, Z = Pv/RT. It is a dimensionless parameter that measures how much a real gas deviates from ideal gas behaviour., Physically, what does Z represent?, It compares the real gas molar volume to ideal gas prediction: Z = real v/ ideal v., Why does Z deviate strongly near the critical point?, Near the critical point: Large density fluctuations occur and the intermolecular forces become insignificant. Gas and liquid phases become indistinguishable., Under what conditions can a gas be approximated as ideal(Z = 1)?, Low pressure, high temperature, low density, far from critical region, Step-by-step: How do you calculate Z from given data?, 1: Use Z = PV/nRT 2: Ensure consistent units 3: Substitute values 4: Check magnitude, close to 1 is near ideal, Why do ideal gases assumptions fail at high pressure?, Molecular volume becomes insignificant, repulsive forces become large, molecules cannot be treated as point particles

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