Q. $0.93\ watt - hour$ of energy is supplied to a block of ice weighing $10\ g.$ It is found that
A) Half of the block melts
B) The entire block melts and the water attains a temperature of $4℃$
C) The entire block just melts
D) The block remains unchanged
Explanation
(c) Energy supplied $= 0.93 \times 3600\ joules = 3348\ joules$
Heat required to melt $10\ gms$ of ice
$= 10 \times 80 \times 4.18 = 3344\ joules$
Hence block of ice just melts
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.