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
- A. 1.5 x \(10^6Jkg^-1\)
- B. 1.35 x \(10^6Jkg^-1\)
- C. 1.5 x \(10^5Jkg^-1\)
- D. 4.5 x \(10^2Jkg^-1\)
Correct Answer: A. 1.5 x \(10^6Jkg^-1\)
Explanation
Pt=mI; I=\(\frac{1500\times300}{0.3}=1.5\times10^6Jkg^-1\)
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