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# Latent heat!! watch

1. How much energy is required to change 1kg of ice at 0 degrees Celsius to 1kg of steam at 100 degrees Celsius?
Latent heat of vapourisation= 2,300,000 J/kg
Latent heat of fusion= 340,000J/kg
Specific heat capacity of water= 4200J/kg degrees Celsius

So far I have worked out that the energy to melt the ice= mass * latent heat of fusion, so 340,000J, and that the energy to heat water into steam from 0 to 100 degrees = mass * capacity of water * change in temp, so it= 420,000J.

Is this right so far, and what else do I need to do to find out the answer
2. Seems alright so far. What else do you need to do? You've already used latent heat of fusion and specific heat capacity of water so you now need to use latent heat of vaporisation.
3. (Original post by spidle)
Seems alright so far. What else do you need to do? You've already used latent heat of fusion and specific heat capacity of water so you now need to use latent heat of vaporisation.
Do I just work out latent heat of vapourisation by doing 1kg * 2,300,000 and get 2,300,000 J as the energy required to heat the water into steam. Then do I just add all my values together?

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Updated: October 30, 2017
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