or Specied oceracy. Jing Comparthe etha ir atdre probe to reach thermal me it ta

Question

or Specied oceracy. Jing Comparthe etha ir atdre probe to reach thermal me it takes the temper 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 w evaporating? When has your body experienced this effect? During evaporation, heat is being exchanged. What is it transferred from, and nat is it transferred to? 5. If you put a cup of hot chocolate at go°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? hald Thornton, and Priscilla Laws © 1999 John Wiley & Sons. Portions of this material have been mo odified and formatted by Armen Kocharian on 02/24/2006, with assistance from Robert A. Pelka. Mod 19

Explanation / Answer

The thermal conductivity of air is 0.024WmK and that the thermal conductivity of water is 0.58WmK. So, water conducts heat more than twenty times as well as air.So water has a higher heat transfer coefficient than air therefore it is easier to exchange heat between a thermometer and water than thermometer and air.

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