Question

A circular plate has a radius of 10 cm and thickness 1 cm. If one face of the plate is kept in contact with steam and the other face is in contact with ice, calculate the amount of heat flowing per hour across the plate. K as 85 W^-1m^-1K^-1.

Answer 1

The amount of heat conducted in t seconds is given by,

Here, K = 85 W m^-1K^-1

A = π r² = 3.14 × (0.1)²

t = 1 hr = 60 × 60 s.

d = 10^-2 m²

(θ₁ – θ₂) = 373 -273 = 100 K

= 96.08×10⁶ J.