What is the compressibility factor Z = (PV) / (nR*T) for an ideal gas under all conditions of temperature and pressure?
Answer and explanation
Correct answer: D. Exactly 1.0
- Step 1: For an ideal gas, PV = nRT holds strictly by definition. Step 2. Therefore, Z = PV / (nRT) = 1.0 under all conditions. Step 3. Deviations (Z > 1 due to repulsive volume forces, or Z < 1 due to attractive van der Waals forces) characterize real gases. Answer: Exactly 1.0. Why not the others: Z deviates from 1.0 only for real gases.
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