What is the difference in the amount of heat given out by 4kg of steam and 4kg of water when both are cooled from 100^oC to 80^oC? [the specific latent heat of steam is 2,260,000Jkg^-1, specific heat capacity of water is 4200Jkg^-1K^-1]

4200J

2,260,OOOJ

9,040,000J

9,380,000J

Correct answer is C

Heat by water = mc\(\theta\)

Heat by steam = mc\(\theta\) + mL

Difference = mL = 4 x 2,260,000

= 9,040,000J

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What is the difference in the amount of heat given out by 4kg of steam and 4kg of water when both are cooled from 100oC to 80oC? [the specific latent heat of steam is 2,260,000Jkg-1, specific heat capacity of water is 4200Jkg-1K-1]