a sample of H2O with a mass of 46.0 grams has a temperature of -58.0 degress celcius. how many joules of energy are necessary to melt 46.0 grams of ice?

Answer 1

Note the correct spelling of celsius.
q to move temperature of ice from -58 to zero.
q = mass ice x specific heat ice x [Tfinal-Tinitial].
Tfinal is zero and Tinitial is -58.

q to melt the ice.
q = mass ice x heat fusion.

total Q = q1 + q2.