Question

A brass boiler has a base area of 0.15m2 and thickness 1.0cm. It boils water at the rate of 6kg| min when placed on a gas stove, Estimate the temperature of the part of flame in contact with the boiler. Thermal conductivity of brass = 109J|*|m|0C, heat of vaporization of water = 2256J|g?

Answer 1

Rate of boiling of water is = 6.0Kg / min

Rate at which heat is supplied by the flame to water is :-

m = Rate of boiling of water

L = heat of vaporization of water

θ = m L

= 100g/* x 2256J/g

Θ = 225 600J/*

Now, T2 = Temperature of cold junction = 1000C