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Get Full Access to College Physics - 1 Edition - Chapter 14 - Problem 28pe
Get Full Access to College Physics - 1 Edition - Chapter 14 - Problem 28pe

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# In some countries, liquid nitrogen is used on dairy trucks

ISBN: 9781938168000 42

## Solution for problem 28PE Chapter 14

College Physics | 1st Edition

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Problem 28PE

Problem 28PE

In some countries, liquid nitrogen is used on dairy trucks instead of mechanical refrigerators. A 3.00-hour delivery trip requires 200 L of liquid nitrogen, which has a density of 808 kg/m3 .

(a) Calculate the heat transfer necessary to evaporate this amount of liquid nitrogen and raise its temperature to 3.00ºC . (Use cp and assume it is constant over the temperature range.) This value is the amount of cooling the liquid nitrogen supplies.

(b) What is this heat transfer rate in kilowatt-hours?

(c) Compare the amount of cooling obtained from melting an identical mass of 0ºC ice with that from evaporating the liquid nitrogen.

Step-by-Step Solution:
Step 1 of 3

Solution 28PE

1. 1.57 x 104 kcal amount of heat is necessary to evaporate the amount of nitrogen and raise its temperature to 3 degree Celsius.
2. the heat transfer is 18.3 kWh
3. the amount of cooling obtained is 1.29 x 104 kcal

Step 2 of 3

Step 3 of 3

##### ISBN: 9781938168000

Since the solution to 28PE from 14 chapter was answered, more than 353 students have viewed the full step-by-step answer. This textbook survival guide was created for the textbook: College Physics , edition: 1. College Physics was written by and is associated to the ISBN: 9781938168000. This full solution covers the following key subjects: nitrogen, liquid, amount, temperature, transfer. This expansive textbook survival guide covers 34 chapters, and 3125 solutions. The full step-by-step solution to problem: 28PE from chapter: 14 was answered by , our top Physics solution expert on 07/07/17, 04:39PM. The answer to “In some countries, liquid nitrogen is used on dairy trucks instead of mechanical refrigerators. A 3.00-hour delivery trip requires 200 L of liquid nitrogen, which has a density of 808 kg/m3 .(a) Calculate the heat transfer necessary to evaporate this amount of liquid nitrogen and raise its temperature to 3.00ºC . (Use cp and assume it is constant over the temperature range.) This value is the amount of cooling the liquid nitrogen supplies.(b) What is this heat transfer rate in kilowatt-hours?(c) Compare the amount of cooling obtained from melting an identical mass of 0ºC ice with that from evaporating the liquid nitrogen.” is broken down into a number of easy to follow steps, and 102 words.

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