How Much Heat is Needed to Convert Ice at -10C to Steam at 110C?

[bommie]

How much heat (in joules) must be added to change 20.0g of H₂O(s) at -10C to steam at 110C? The specific heat of H₂O(s) is 2.09 J/gC; of H₂O(L) is 4.184 J/gC; and of H₂O(g) is 1.84 J/gC. The heat fusion of water is 334.7 J/g and the heat vaporization of water is 2259.4J/g.I feel like we have to find the temp for s ---> l and then l ---> g. But I'm completely lost; I don't understand Thermochemistry.

 

[Borek]

Split it into separate parts - you have to warm up ice till it can be melted, you have to melt it, you have to warm the the water till boiling point, you have to boil it, you finally have to warm up steam. Then add everything.

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