An electric kettle rated 1500W boils away 0.3kg of a liquid at its boiling point…

Physics WAEC 1994

An electric kettle rated 1500W boils away 0.3kg of a liquid at its boiling point every 300s. Calculate the specific latent heat of the vaporisation of the liquid

  • 1.5 x \(10^6Jkg^-1\) checkmark
  • 1.35 x \(10^6Jkg^-1\)
  • 1.5 x \(10^5Jkg^-1\)
  • 4.5 x \(10^2Jkg^-1\)
  • 3 x \(10^2Jkg^-1\)

The correct answer is: A

Explanation

Pt=mI; I=\(\frac{1500\times300}{0.3}=1.5\times10^6Jkg^-1\)
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