Answered: 1) At 20°C, a glass cube has an edge…

1) At 20°C, a glass cube has an edge length of 100 cm. What is the increase in the cube's surface area when it is heated from 20°C to 80°C? (The coefficient of linear expansion of glass

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter16: Temperature And The Kinetic Theory Of Gases

Section: Chapter Questions

Problem 12P

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Question

Please and thank you for your help!

1) At 20°C, a glass cube has an edge length of 100 cm. What is the increase in the cube's
surface area when it is heated from 20°C to 80°C? (The coefficient of linear expansion of glass
is 9 x 10-6/°C.)

Expert Solution

Step 1

L⁰ = 100 cm

T1 = 20° C

T2 = 80°C

∆T = T2-T1 = 60 °C

∆T = 60 both in Kelvin and in celcius

Now expansion coeff ã = 9*10^(-6)

So the linear expansion is written as

L = L⁰ ( 1+ã∆T )

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