Temperature and Heat - what am i doing wrong?

[grandprix]

Homework Statement

lf = 79500 cal/kg ,
lv = 5.4 × 105 cal/kg ,
c = 1000 cal/kg ◦ C.

9 kg of ice at 0◦C is converted to steam at
100◦C.
How much heat is needed? Answer in units
of kcal.

Homework Equations

q=mct

The Attempt at a Solution

100*9kg + 79.5 + 540 = 1519.5

I am getting this wrong I don't know why

 

[cepheid]

Can you explain what each term in your attempted solution means? They don't seem to make sense. They don't match the numbers given in the problem? It would be helpful if you explained what you were doing.

Also, what three processes (involving heat) have to occur in order to get from ice at 0C to steam at 100C?

 

[Redbelly98]

If lf is 79500 cal/kg, and you have 9 kg of ice, then how much energy is required to melt the ice?

Hint: the answer it not 79.5.

Also, what is the value of c for water?

 

[grandprix]

I got the answer! Thanks for your help.