Q.

The melting temperature of a certain mass of a solid object is 20°C. When a heat Q is added to the object, its 34material melts. When an additional amount of Q heat is added the material transforms to its liquid state at 50°C. Find the ratio of specific latent heat of fusion (in J/g) to the specific heat capacity of the liquid (in J g-1 °C-1) for the material.

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answer is 60.

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Detailed Solution

Let the mass of the solid object be m, and specific latent heat of fusion be L ,According to problem, Q=34mL ……..(i)2Q=mL+ms(50−20)   ………(ii)From (i) and (ii), 32mL=mL+30ms⇒L2=30s⇒Ls=60
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