Properties Of Solids And Liquids Question 49
Question: 0.93 watt-hour of energy is supplied to a block of ice weighing 10 gm. It is found that [NCERT 1973; DPMT 1999]
Options:
A) Half of the block melts
B) The entire block melts and the water attains a temperature of 4°C
C) The entire block just melts
D) The block remains unchanged
Show Answer
Answer:
Correct Answer: C
Solution:
Energy supplied $ =0.93\times 3600joules $ = 3348 joules
Heat required to melt 10 gms of ice $ =10\times 80\times 4.18=3344joules $
Hence block of ice just melts.
