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Calculate the energy required to vapourise 50g of water initially at 80oC.[specific ...

Calculate the energy required to vapourise 50g of water initially at 80oC.[specific heat capacity of water = 2260Jg-1K-1][specific latent heat of vaporisation of water = 2260Jg-1]
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  • A 113,000J
  • B 117,200J
  • C 234,400J
  • D 420,000J
Correct Answer: Option B
Explanation:
mc\(\theta\) + ML = 50 x 4.2 x 20 + 50 x 2260
= 117,200J

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