The melting point of paraffin wax (which contracts on solidification) _______________ with pressure rise?
Correct answer: A. Increases
- A. Increases
- B. Decreases
- C. Remains unchanged
- D. Decreases linearly
Explanation
For melting, dT/dP = ΔV/ΔS; because paraffin contracts on solidification, melting involves an increase in volume, while ΔS of melting is positive. Hence the melting point increases as pressure rises.
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