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PHY221
Thermal Properties of Materials

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Overview

Purpose
In this module we examine the effect that addition or subtraction of thermal energy has on the temperature and some of the physical properties of a material. We need to know about thermal expansion, for example, so the filings of your teeth expand and contract at the same rate as your tooth. You do not want your tooth bursting at high temperatures (hot bowl of soup) or falling out at cold temperatures (iced tea). Another item for this lesson is the result of mixing substances of different temperatures--conservation of energy again. We finish with change of phase....the background physics of air conditionors and heat pumps!

Prerequisites
o Completion of quiz 7 (70% or better)

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Target Learning Outcomes
 

Target Competency
8. Analyze the thermal properties of materials
Linked Core Abilities
A. demonstrate ability to think critically
B. solve problems
C. demonstrate effective written communication
D. apply scientific concepts
E. demonstrate essential computer skills

Performance Standards
You will demonstrate your competence:
o by analyzing the thermal properties of materials
o by analyzing the thermal properties of phase change
o by using text and notes
o by successfully completing online quiz (at least 70%)
o without a "partner"
o by successfully completing in-class assessment (conditions with assessment)


Your performance will be successful when:
o you distinguish between thermal energy and temperature
o you convert between the temperature scales T, C, and F
o you describe the calibration of F and C temperature scale
o you distinguish between T and C; R and F temperature scales
o you apply concepts of heat transfer to physical problems
o you explain and distinguish between the methods of heat transfer
o you solve problems in thermal expansion
o you solve thermal mixture problems
o you apply concepts of phase change to physical problems
o you include method of mixtures to phase change problems
o you predict the effect of a phase change on the environment

Learning Objectives
This learning plan addresses the following learning objectives to help you master the competency:
a. Explain the calibration of a mercury-in-glass thermometer
b. Explain the molecular property of temperature
c. Define thermal energy (heat) and temperature
d. Define absolute temperature scales (K and R) and Fahrenheit/Celsius scales
e. Perform back-and-forth conversions between K<----->C and F <-----> C temperature scales
f. Define calorie
g. Define BTU
h. Perform back-and-forth conversions between calorie and Joulw
i. Write and explain the coefficient of linear, areal, and volume expansion relationship of solids
j. Write and explain the thermal expansion relationship of liquids
k. Draw and label a phase change graph for water
l. Calculate the energy required to change the temperature of a substance
m. Calculate the energy required to change the phase of a substance
n. Explain the effect of temperature changes or phase changes on the surroundings
o. Explain the operation a heat pump
p. Define calorimetry
q. Perform calculations using the conservation of energy (method of mixtures)
r. Explain with examples three methods of heat transfer
s. Calculate heat flow through layers of materials
t. Calculate net R-value for typical wall constructions
u. Distinguish between an R-value and thermal conductivity

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Learning Activities
_____1.
READ sections 19.1-19.4

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be able to REPRODUCE and EXPLAIN example problems 19.1,19.2,19.3,19.4

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SOLVE assigned problems in chapter 19

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READ sections 20.1-20.3

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be able to REPRODUCE and EXPLAIN example problems 20.1-20.4

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READ sections 20.7

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be able to REPRODUCE and EXPLAIN example problems 20.9-20.11

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SOLVE assigned problems chapter 20

_____9.
be able to REPRODUCE and EXPLAIN in-class-examples for chpts 19 & 20

_____10.
COMPLETE specific heat of Aluminum lab

_____11.
COMPLETE online quiz

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Assessment Activities
_____1.
Complete quiz 8 (70% or better)

_____2.
Submit specific heat of Al lab

_____3.
Contribute to discussion

_____4.
Complete in class assessment (conditions with assessment)

hfish@kvcc.edu
12/3/03