4. What effect does the evaporation of water have on the object from which it is evaporating? When has your body experienced this effect? During evaporation, heat is being exchanged. What is it transferred from, and what is it transferred to?

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Question 4
(RTP2-1)
1. Approximately what is human body temperature on the Celsius temperature
scale and on the Kelvin scale? What is room temperature?
Human body temperature in Celsius: 372°C
Human body temperature in kelvin:310.35K
Room temperature: 25°C = 298.15K
2. Why must a thermometer be calibrated? You have a glass bulb thermometer
with no markings on it and a second one marked in degrees Celsius. Explain
how you would calibrate the unmarked thermometer. n order to calibrate a
thermometer, the bulb is made to reach thermal equilibriur
with the temperature standard such as ice and the
with another, standard such as water or vagor and t
tybe divided in to regylar intervals betweenafixed poin
Compare the length of time it tåkes the temperature probe tfo reach thermaľ
equilibrium with the air or water it is in. Is it easier to exchange heat between a
thermometer and air or between a thermometer and water?
4. What effect does the evaporation of water have on the object from which it is
evaporating? When has your body experienced this effect? During
evaporation, heat is being exchanged. What is it transferred from, and what
is it transferred to?
5. If you put a cup of hot chocolate at 90°C on a table in a room kept at 25°C,
you know it will cool down.
a.
How cool will the hot chocolate get?
b.
If you put it outside where the temperature is 5°C, how cool will it get?
Sokoloff. Ronald Thornton, and Priscilla Laws © 1999 John Wiley & Sons. Portions of this material have been
atted by W. Duxler (2/8/2004); A. Kocharian (02/24/2006) with assistance from R. Pelka; M. Wessling (06/26/2017) 19
Transcribed Image Text:(RTP2-1) 1. Approximately what is human body temperature on the Celsius temperature scale and on the Kelvin scale? What is room temperature? Human body temperature in Celsius: 372°C Human body temperature in kelvin:310.35K Room temperature: 25°C = 298.15K 2. Why must a thermometer be calibrated? You have a glass bulb thermometer with no markings on it and a second one marked in degrees Celsius. Explain how you would calibrate the unmarked thermometer. n order to calibrate a thermometer, the bulb is made to reach thermal equilibriur with the temperature standard such as ice and the with another, standard such as water or vagor and t tybe divided in to regylar intervals betweenafixed poin Compare the length of time it tåkes the temperature probe tfo reach thermaľ equilibrium with the air or water it is in. Is it easier to exchange heat between a thermometer and air or between a thermometer and water? 4. What effect does the evaporation of water have on the object from which it is evaporating? When has your body experienced this effect? During evaporation, heat is being exchanged. What is it transferred from, and what is it transferred to? 5. If you put a cup of hot chocolate at 90°C on a table in a room kept at 25°C, you know it will cool down. a. How cool will the hot chocolate get? b. If you put it outside where the temperature is 5°C, how cool will it get? Sokoloff. Ronald Thornton, and Priscilla Laws © 1999 John Wiley & Sons. Portions of this material have been atted by W. Duxler (2/8/2004); A. Kocharian (02/24/2006) with assistance from R. Pelka; M. Wessling (06/26/2017) 19
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