If the temperature inside the fridge is 35°F and the temperature outside is 70°F what is the maximum possible efficiency of the refrigerator. (Hint: You need to convert both temperatures to Kelvin first. Google can do this conversion for you.)

College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
icon
Related questions
Question
### Understanding Refrigerator Efficiency

Refrigerators operate similarly to air conditioners by pumping heat from the inside to the outside. The efficiency of a refrigerator is defined by the ratio of the heat removed from the inside (\(Q_{\text{cold}}\)) to the work (\(W\)) done by the electric motor:

\[
\eta_{\text{AC}} = \frac{Q_{\text{cold}}}{W}
\]

Where:
- \(\eta_{\text{AC}}\) is the efficiency.
- \(Q_{\text{cold}}\) is the heat removed from the fridge.
- \(W\) is the work done.

#### Maximum Theoretical Efficiency

The maximum theoretical efficiency of a refrigerator, considering the temperatures involved, is given by:

\[
\eta_{\text{AC max}} = \frac{T_C}{T_H - T_C}
\]

Where:
- \(T_C\) is the temperature inside the refrigerator (in Kelvin).
- \(T_H\) is the temperature outside the refrigerator (in Kelvin).

### Problem Example

1. **Temperature Conversion and Calculation:**

   If the inside fridge temperature is 35°F and the outside temperature is 70°F, we are tasked with finding the maximum possible efficiency of the refrigerator.

   **Hint:** Convert the temperatures from Fahrenheit to Kelvin. Google or a calculator can assist with this conversion.

By using these concepts and formulas, you can determine the efficiency and performance metrics of refrigeration systems in various conditions.
Transcribed Image Text:### Understanding Refrigerator Efficiency Refrigerators operate similarly to air conditioners by pumping heat from the inside to the outside. The efficiency of a refrigerator is defined by the ratio of the heat removed from the inside (\(Q_{\text{cold}}\)) to the work (\(W\)) done by the electric motor: \[ \eta_{\text{AC}} = \frac{Q_{\text{cold}}}{W} \] Where: - \(\eta_{\text{AC}}\) is the efficiency. - \(Q_{\text{cold}}\) is the heat removed from the fridge. - \(W\) is the work done. #### Maximum Theoretical Efficiency The maximum theoretical efficiency of a refrigerator, considering the temperatures involved, is given by: \[ \eta_{\text{AC max}} = \frac{T_C}{T_H - T_C} \] Where: - \(T_C\) is the temperature inside the refrigerator (in Kelvin). - \(T_H\) is the temperature outside the refrigerator (in Kelvin). ### Problem Example 1. **Temperature Conversion and Calculation:** If the inside fridge temperature is 35°F and the outside temperature is 70°F, we are tasked with finding the maximum possible efficiency of the refrigerator. **Hint:** Convert the temperatures from Fahrenheit to Kelvin. Google or a calculator can assist with this conversion. By using these concepts and formulas, you can determine the efficiency and performance metrics of refrigeration systems in various conditions.
Expert Solution
trending now

Trending now

This is a popular solution!

steps

Step by step

Solved in 2 steps with 2 images

Blurred answer
Knowledge Booster
Gibbs free Energy
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.
Similar questions
Recommended textbooks for you
College Physics
College Physics
Physics
ISBN:
9781305952300
Author:
Raymond A. Serway, Chris Vuille
Publisher:
Cengage Learning
University Physics (14th Edition)
University Physics (14th Edition)
Physics
ISBN:
9780133969290
Author:
Hugh D. Young, Roger A. Freedman
Publisher:
PEARSON
Introduction To Quantum Mechanics
Introduction To Quantum Mechanics
Physics
ISBN:
9781107189638
Author:
Griffiths, David J., Schroeter, Darrell F.
Publisher:
Cambridge University Press
Physics for Scientists and Engineers
Physics for Scientists and Engineers
Physics
ISBN:
9781337553278
Author:
Raymond A. Serway, John W. Jewett
Publisher:
Cengage Learning
Lecture- Tutorials for Introductory Astronomy
Lecture- Tutorials for Introductory Astronomy
Physics
ISBN:
9780321820464
Author:
Edward E. Prather, Tim P. Slater, Jeff P. Adams, Gina Brissenden
Publisher:
Addison-Wesley
College Physics: A Strategic Approach (4th Editio…
College Physics: A Strategic Approach (4th Editio…
Physics
ISBN:
9780134609034
Author:
Randall D. Knight (Professor Emeritus), Brian Jones, Stuart Field
Publisher:
PEARSON