Question

If water heat of fusion is 80 cal/g, how many heat is required to covert 30g of ice at 0 degree C to liquid water at 30 degree C?

A 800 cal
B 600 cal
C 2200 cal
D 1000 cal
E 3300 cal

Answer 1

to find the heat, you need to find the heat of ice at 0 and when it melts into liquid

heat ice= heat of fusion x mass

heat of liquid= specific heat x mass x ΔT

specific heat of water= 1.00 cal/g C
mass= 30 grams
ΔT= 30 - 0= 30C

heat of ice= 80 x 30= 2400 calories

heat of liquid= 1.00 x 30 x 30C= 900 calories

total heat= 2400 + 900= 330 calories

answer is E