2016 · Q35
A piece of ice, 100 g in mass is kept at 0°C. The amount of heat it requires to melt at 0°C is (take latent heat of melting of ice to be 333.6 J/g):
General KnowledgePhysics
- A750.6 J
- B83.4 J
- C33360 J
- D3.336 J
Explanation
The heat required to melt ice at its melting point is Q = m x L, where m is the mass and L the latent heat of fusion. Here m = 100 g and L = 333.6 J/g, so Q = 100 x 333.6 = 33,360 J. No temperature change is involved since the ice melts at a constant 0 deg C. The other options are orders of magnitude off, confirming option (C).