An internal combustion engine has the following characteristics: (a) the combustion chamber temperature is 1900 ᵒC; (b) the temperature in the exhaust chamber is 430 ᵒC; (c) with the consumption of the equivalent of 7.0 × 10⁹ cal of fuel the engine produces 1.4 × 10¹⁰ J of work in one hour. What is the thermal efficiency of this engine? I. 77% II. 68% III. 56% IV. 48% V. 37% VI. 25% If necessary, consider: R = 8.314 J/mol∙K 1 cal = 4.19 J kb =1,38 x 10⁻²³ m² kg s⁻² K⁻¹
An internal combustion engine has the following characteristics: (a) the combustion chamber temperature is 1900 ᵒC; (b) the temperature in the exhaust chamber is 430 ᵒC; (c) with the consumption of the equivalent of 7.0 × 10⁹ cal of fuel the engine produces 1.4 × 10¹⁰ J of work in one hour. What is the thermal efficiency of this engine? I. 77% II. 68% III. 56% IV. 48% V. 37% VI. 25% If necessary, consider: R = 8.314 J/mol∙K 1 cal = 4.19 J kb =1,38 x 10⁻²³ m² kg s⁻² K⁻¹
Physics for Scientists and Engineers, Technology Update (No access codes included)
9th Edition
ISBN:9781305116399
Author:Raymond A. Serway, John W. Jewett
Publisher:Raymond A. Serway, John W. Jewett
Chapter20: The First Law Of Thermodynamics
Section: Chapter Questions
Problem 20.12OQ: If a gas is compressed isothermally, which of the following statements is true? (a) Energy is...
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An internal combustion engine has the following characteristics: (a) the combustion chamber temperature is 1900 ᵒC; (b) the temperature in the exhaust chamber is 430 ᵒC; (c) with the consumption of the equivalent of 7.0 × 10⁹ cal of fuel the engine produces 1.4 × 10¹⁰ J of work in one hour. What is the thermal efficiency of this engine?
I. 77%
II. 68%
III. 56%
IV. 48%
V. 37%
VI. 25%
If necessary, consider:
R = 8.314 J/mol∙K
1 cal = 4.19 J
kb =1,38 x 10⁻²³ m² kg s⁻² K⁻¹
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