(4 blanks) An ice-making machine operates in a Carnot cycle. It takes heat from water at 0.0 °C and rejects heat to a room at 24.0 °C. Suppose tha: 85.0 kg of water a: 0.0 °C are converted to ice at 0.0 °C. How much energy (in Joules) must be supplied to the machine to achieve this task? Sol. Since the machine is a operating in a Carnot cycle, then, its efficiency is THỊ By virtue of first law, the work done to convert water to ice is given by W =Q Thus, the total energy needed to convert 85 kg of water is ET= 687.5 J
(4 blanks) An ice-making machine operates in a Carnot cycle. It takes heat from water at 0.0 °C and rejects heat to a room at 24.0 °C. Suppose tha: 85.0 kg of water a: 0.0 °C are converted to ice at 0.0 °C. How much energy (in Joules) must be supplied to the machine to achieve this task? Sol. Since the machine is a operating in a Carnot cycle, then, its efficiency is THỊ By virtue of first law, the work done to convert water to ice is given by W =Q Thus, the total energy needed to convert 85 kg of water is ET= 687.5 J
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)...
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Transcribed Image Text:(4 blanks) An ice-making machine operates in a Carnot cycle. It takes heat from water at 0.0 °C and rejects heat to a room at 24.0 °C. Suppose that: 85.0 kg of water at 0.0 °C are converted to ice at 0.0 °C. How much energy (in Joules) must be supplied to the machine to
achieve this task?
Sol.
Since the machine is a operating in a Carnot cycle, then, its efficiency is
-1
THỊ
By virtue of first law, the work done to convert water to ice is given by
W = Q =
Thus, the total energy needed to convert 85 kg of water is
ET =
687.5 J
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