Question

A brass boiler has a base area of 0.15m² and thickness 1.0cm. It boils water at the rate of 6.0 kg/min when placed on a gas stove. Estimate the temperature of the part of the flame in contact with the boiler. Thermal conductivity of brass = 109 J s^-1 m^-1K^-1;

Heat of vaporisation of water = 2256 × 10³ J kg^-1.

Answer 1

A = 0.15m², d = 10^-2m,

\(\frac{m}{t}\)=\(\frac{6}{60}\) kgs^-1 = 0.1kgs^-1,

K = 109J s^-1 m^-1 K^-1, L = 2256 × 10³ Jkg^-1,

θ₁ = ?,

θ₂ = 100°C