posted by John .
How much heat is gained or lost when 200 grams of ice melts?
you need to first look for the latent heat of fusion (Lf) --- this is a constant, then use the formula:
Q = m(Lf)
where Q = heat in Joules, m = mass in grams
*since it melted, it definitely absorbed/gained heat, thus Q is (+)
so there,, :)