The nature of surfaces affects the absorption and thereflection of radiation. Assume that you are given woodfor construction and asked to take two pieces of the woodto be placed in sunlight. One piece is to be painted whiteand the other black. Which piece will absorb more heat?If the same two pieces at room temperature are laid onthe ground in the middle of the night during theharmattan in Bolgatanga in the Upper East region, whichpiece will cool faster? Give argument in support of youranswer.

Answered: The nature of surfaces affects the…

Introduction to Chemical Engineering Thermodynamics

8th Edition

ISBN:9781259696527

Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart

Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart

Chapter1: Introduction

Section: Chapter Questions

Problem 1.1P

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The nature of surfaces affects the absorption and the
reflection of radiation. Assume that you are given wood
for construction and asked to take two pieces of the wood
to be placed in sunlight. One piece is to be painted white
and the other black. Which piece will absorb more heat?
If the same two pieces at room temperature are laid on
the ground in the middle of the night during the
harmattan in Bolgatanga in the Upper East region, which
piece will cool faster? Give argument in support of your
answer.

Expert Solution

Step 1

Out of the two given bodies, the one which heats up quickly and one which cools faster is to be mentioned for different environment.

Step 2

IN SUNLIGHT:-

Out of the 2 bodies given, a black body completely absorbs the amount of heat falling on its surface while the white body absorbs the heat partially to some extent.

Thus, a piece of wood which is painted black acts as a black body and absorbs more amount of heat.

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