Question

How much heat energy must be absorbed to completely melt 35.0 grams of `H_2O`(s) at 0°C?

Answer 1

`11690` joules

Explanation:

Here, we melt the piece of ice, so we use the latent heat of fusion. The equation is thus:

`q=mL_f`

where:

• `q` is the heat energy supplied in joules

• `m` is the mass of the substance

• `L_f` is the latent heat of fusion of the substance

So here, we get:

`q=35color(red)cancelcolor(black)"g"*(334 \ "J")/(color(red)cancelcolor(black)"g")=11690 \ "J"`