Question

how much heat is needed to melt 30g of ice at 0c

qfus = 80cal/g

cal/g=334

Answer 1

Mass of ice = 30 g

Temperature of ice = 0ºC

q_fus = 80 cal/g

The amount of heat required to melt 1 g of solid ice to liquid water at the normal melting point of ice, i.e, 0ºC is defined as q_fus and the numerical value of the same is 80 cal/g.

Therefore, the amount of heat energy required to melt 30 g of solid ice at its normal melting point of 0ºC = (mass of ice)*q_fus

= (30 g)*(80 cal/g)

= 2400 cal (ans).