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The specific latent heat of vapourization of lead is 8.7 × \(10^5 Jkg_1\). This means...

Physics
WAEC 2023

The specific latent heat of vapourization of lead is 8.7 × \(10^5 Jkg_1\). This means that 8.7 × \(10^5\) J of thermal energy is required to change

  • A. a given mass of molten lead to vapour at constant temperature and pressure.
  • B. 1 kg of molten lead to vapour at constant temperature and pressure.
  • C. 1 kg of solid lead to vapour at constant temperature and pressure.
  • D. 1 kg of molten lead to vapour for every degree rise in temperature.
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Correct Answer: Option B
Explanation

The specific latent heat of vaporization of lead is the amount of thermal energy required to change 1 kg of molten lead to vapor at constant temperature and pressure.

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