With the increase of pressure, the boiling point of any substance:
Correct answer: B. Increases
- A. Decreases
- B. Increases
- C. Remains same
- D. Becomes Zero
Explanation
A liquid boils when its vapour pressure equals the surrounding pressure. Increasing the external pressure requires a higher temperature to reach that vapour pressure, so the boiling point increases. Students may choose 'decreases' by confusing boiling with evaporation, which can occur at lower temperatures.
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About Thermal Equilibrium and Heat
Thermal equilibrium means that bodies in contact have the same temperature and no net heat flows between them. The topic distinguishes heat from temperature, uses the zeroth law of thermodynamics, and covers heat transfer, specific heat capacity, thermal expansion and the conditions for reaching equilibrium.
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