Answer:
316.5 cals.
Explanation:
(a) heat needed to change temperature from absolute zero to melting temperature of ice
= mass x specific heat x rise in temperature
= 1 x .5 x 273 = 136.5 cals
b ) heat needed to melt the ice
= mass x latent heat of melting
= 1 x 80 = 80 cals
c ) heat needed to change temperature from melting temperature to boiling temperature.
mass x specific heat x rise in temperature
1 x 1 x 100
= 100 cals
Total heat required
= 136.5 + 80 + 100
= 316.5 cals.