Pasteurization – partial sterilization of a milk without boiling it and is based on Louis Pasteur's discovery that germs temporarily stop functioning if every particle of the milk is heated to 64°C and then the milk is quickly cooled. An educator farmer decided to pasteurize a milk for the first time but, unfortunately, found that his thermometer was broken. Since the farmer is educated one, he decided to solve the problem of warming the milk precisely to 64° C having at his disposal only an oven and his watch, by using Newton Law of Cooling instead of the broken thermometer. How can he do it at the following given conditions? Room temperature is 25°C Oven temperature is 250°C (and wait until the milk boils) It takes 15 min for the milk to boil Boiling temperature of the milk is 90°C Solution. Please write your detailed solution here:

Pasteurization – partial sterilization of a milk without boiling it and is based on Louis Pasteur's discovery that germs temporarily stop functioning if every particle of the milk is heated to 64°C and then the milk is quickly cooled. An educator farmer decided to pasteurize a milk for the first time but, unfortunately, found that his thermometer was broken. Since the farmer is educated one, he decided to solve the problem of warming the milk precisely to 64° C having at his disposal only an oven and his watch, by using Newton Law of Cooling instead of the broken thermometer. How can he do it at the following given conditions? Room temperature is 25°C Oven temperature is 250°C (and wait until the milk boils) It takes 15 min for the milk to boil Boiling temperature of the milk is 90°C Solution. Please write your detailed solution here:

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter10: Thermal Physics

Section: Chapter Questions

Problem 4P: Death Valley holds the record for the highest recorded temperature in the United States. On July 10,...

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In car racing, one advantage of mixing liquid nitrous oxide (N2O) with air is that the boiling of the "nitrous" absorbs latent heat of vaporization and thus cools the air and ultimately the fuel-air mixture, allowing more fuel-air mixture to go into each cylinder. As a very rough look at this process, suppose 1.0 mol of nitrous oxide gas at its boiling point, 88 , is mixed with 4.0 mol of air (assumed diatomic) at 30 . What is the final temperature of the mixture? Use the measured heat capacity of N2O at 25 , which is 30.4J/mol . (The primary advantage of nitrous oxide is that it consists of 1/3 oxygen, which is more than air contains, so it supplies more oxygen >to bum the fuel. Another advantage is that its decomposition into nitrogen and oxygen releases energy in the cylinder.)
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