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# The figure given below shows the cooling curve of pure wax material after heating. It cools from A to B and solidifies along BD. lf L and C arc respective values of latent heat and the specific heat of the liquid wax, the ratio L/C is

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a
40
b
80
c
100
d
20
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detailed solution

Correct option is D

Let the quantity of heat supplied per minute be Q.Then quantity of heat supplied in 2 min = mC(90 - 80)In 4 min, heat supplied = 2m C(90 - 80)∴2mC(90−80)=mL⇒LC=20

Similar Questions

A calorimeter of water equivalent 10 g contains a liquid of mass 50 g at 40oC. When m gram of ice at -10oC is put into the calorimeter and the mixture is allowed to attain equilibrium, the final temperature was found to be 20oC. It is known that specific heat capacity of the liquid changes with temperature as where $\mathrm{\theta }$ is temperature in oC. The specific heat capacity of ice, water and the calorimeter remains constant and values are  and latent heat of fusion of ice is ${\mathrm{L}}_{\mathrm{f}}=80{\mathrm{calg}}^{-1}$. Assume no heat loss to the surrounding and calculate the value of m in grams.

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