Chapter 20: Problem 3
A gasoline engine takes in 1.61 \(\times\) 10\(^4\) J of heat and delivers 3700 J of work per cycle. The heat is obtained by burning gasoline with a heat of combustion of 4.60 \(\times\) 10\(^4\) J/g. (a) What is the thermal efficiency? (b) How much heat is discarded in each cycle? (c) What mass of fuel is burned in each cycle? (d) If the engine goes through 60.0 cycles per second, what is its power output in kilowatts? In horsepower?
Short Answer
Step by step solution
Calculate the Thermal Efficiency
Calculate the Heat Discarded
Calculate the Mass of Fuel Burned
Calculate Power Output in Kilowatts
Convert Power Output to Horsepower
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Key Concepts
These are the key concepts you need to understand to accurately answer the question.
Thermal Efficiency
Heat Engine
- In the first phase, the engine absorbs a certain amount of heat \( (Q_{in}) \).
- Then, it converts part of this absorbed heat into work \( (W_{out}) \).
- The remaining heat, which is not converted, is discarded \( (Q_{out}) \).