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A certain mass of a solid exists at its melting temperature of `20^(@)C`. When a heat Q is added `(4)/(5)` of the material melts. When an additional Q amount of 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.A. `20`B. `40`C. `50`D. `60` |
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Answer» Correct Answer - C `Q = (4)/(5)m.L"………"` `2Q = mL +ms(50 - 20)` `rArr (8)/(5)mL = mL + 30 ms` `rArr (3L)/(5) = 30 s rArr (L)/(s) = 50` |
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