How much heat is needed to melt 1.43 grams of ice into water at 0 Celsius?

1 Answer
May 7, 2018

#"477.62 J"#

(or #"478 J"# if you’re keeping significant figures in mind)

Explanation:

When melting ice, you need to use the heat of fusion, #"L"_"f"#. The heat of fusion of ice is #"334 J/g"#. This means that it takes #"334 J"# to turn #"1 g"# of ice into water at #0^@"C"#.

The equation you need to do is #Q= mL_"f"# (#Q# meaning heat and #m# meaning mass.

So #Q= "1.43 g"xx"334 J/g"#.

Grams cancel out and we’re left with

#1.43color(red)cancel(color(black)("g"))xx(334"J")/(color(red)cancel(color(black)("g"))) = "477.62 J"#