# Water is being boiled in a flat bottomed kettle placed on a stove The area of the bottom is 300cm^(2) and the thickness is 2mm If the amount pf st

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Water is being boiled in a flat bottomed kettle placed on a stove The area of the bottom is 300cm^(2) and the thickness is 2mm If the amount pf steam produced is 1gm min^(-1) then the difference of the temperature between the inner and the outer surface of the bottom is (thermal conductivity of the matrial of the kettle 0.5calcm^(-1)C^(-1) latent heat of the steam is equal to 540calg^(-1)) .
A. 12^(@)C
B. 1.2^(@)C
C. 0.2^(@)C
D. 0.012^(@)C

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(dtheta)/(dt) = L.(dm)/(dt) = Heat transfer from bottom = (TD)/(l//KA)
Heat TD = desired temperature difference
therefore (L.l.(dm)/(dt))/(KA) = ((540)(2 xx 10^(-1)(1/60)))/(0.5 xx 300)=0.012^(@)C