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 33 3.6 J/g):

To calculate the heat required to melt a substance at its melting point, the formula Q = m × L is used, where 'm' is the mass and 'L' is the latent heat of fusion [2]. Latent heat represents the energy absorbed during a phase change that occurs without a change in temperature [1]. In this problem, the mass of the ice is 100 g and the specific latent heat of melting (fusion) for ice is given as 333.6 J/g. By multiplying the mass (100 g) by the latent heat (333.6 J/g), the total heat energy required is calculated as 100 × 333.6 = 33360 J [1]. This energy is necessary to overcome the interparticle forces of attraction in the solid state to transition into a liquid state at the same temperature of 0 °C.

Sources

1. [1] Physical Geography by PMF IAS, Manjunath Thamminidi, PMF IAS (1st ed.) > Chapter 22: Vertical Distribution of Temperature > Latent Heat > p. 294
2. [2] Science ,Class VIII . NCERT(Revised ed 2025) > Chapter 7: Particulate Nature of Matter > Activity 7.3 : Let us find out > p. 103