A compound, X , has a melting point of $$\(71^{\circ} \mathrm{C}\)$$ and a boiling point of $$\(375^{\circ} \mathrm{C}\)$$. Which statement about X is correct?
A.
It is a liquid at \(52^{\circ} \mathrm{C}\) and a gas at \(175^{\circ} \mathrm{C}\).
B.
It is a liquid at \(69^{\circ} \mathrm{C}\) and a gas at \(380^{\circ} \mathrm{C}\).
C.
It is a liquid at \(75^{\circ} \mathrm{C}\) and a gas at \(350^{\circ} \mathrm{C}\).
D.
It is a liquid at \(80^{\circ} \mathrm{C}\) and a gas at \(400^{\circ} \mathrm{C}\).
Exam No：0620_w24_qp_13 Year：2024 Question No：3
Answer:
D
Knowledge points:
1.1.1. State the distinguishing properties of solids, liquids and gases
1.1.2. Describe the structures of solids, liquids and gases in terms of particle separation, arrangement and motion
1.1.3. Describe changes of state in terms of melting, boiling, evaporating, freezing and condensing
1.1.4. Describe the effects of temperature and pressure on the volume of a gas
1.1.5. Explain changes of state in terms of kinetic particle theory, including the interpretation of heating and cooling curves
1.1.6. Explain, in terms of kinetic particle theory, the effects of temperature and pressure on the volume of a gas
Solution:
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