Chapter 14, Problem 35P

To determine

Rate of heat flow through conduction

Answer to Problem 35P

Solution:

$1.6\times {10}^4\text{W}$

Explanation of Solution

Given Info:

External temperature -5°C

Formula used:

Rate of heat flow can be calculated by

$\frac{Q}{t}=kA\frac{T_1-T_2}{l}$

Calculation:

$\begin{array}{l}\frac{Q}{t}=kA\frac{T_1-T_2}{l}\\ =\frac{\text{0}\text{.84J}}{\text{s}\text{.m}\text{.°C}}{\text{(3m}}^{\text{2}})\frac{(15-(-5))\text{°C}}{3.2\times {10}^{-3}}\\ =1.6\times {10}^4\text{W}\end{array}$