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

1 Answer
Nam D.
Jun 4, 2018

#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"#

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