Heat Waste [8] An automobile engine has an efficiency of 20% and delivers on average 19...
6 Example 15-8, An engine has efficiency of 22% and produces 18000 J mechanical work at taking in a temperature heat of 810°. a) How much heat input is required, b) how much heat is discharged as waste and c) at what temperature does it spew heat (consider Carnot engine) (10 points)
Engine 1 has an efficiency of 0.19 and requires 6000 J of input heat to perform a certain amount of work. Engine 2 has an efficiency of 0.23 and performs the same amount of work. How much input heat does the second engine require?
Engine 1 has an efficiency of 0.10 and requires 5500 J of input heat to perform a certain amount of work. Engine 2 has an efficiency of 0.30 and performs the same amount of work. How much input heat does the second engine require?
Let's begin with an efficiency analysis of a gasoline engine. The engine in a large truck takes in 2500 J of heat and delivers 500 J of mechanical work per cycle. The heat is obtained by burning gasoline with heat of combustion Le = 5.0 x 104 J/g. (a) What is the thermal efficiency of this engine? (b) How much heat is discarded in each cycle? (c) How much gasoline is burned during each cycle? (d) If the engine goes...
1a. Engine (1) has an efficiency of 0.12 and requires 5490 J of input heat to perform a certain amount of work. Engine (2) has an efficiency of 0.28 and performs the same amount of work. How much input heat does the second engine require? b. An ideal heat engine takes in heat from a reservoir at 320 °C and has an efficiency of 28%. If the exhaust temperature does not vary and the efficiency is increased to 43%, what would...
A heat engine does 20 J of work per cycle while exhausting 30 J of waste heat. What is the engine's thermal efficiency? Express your answer using two significant figures. Write the answer as a percent
A four-cylinder gasoline engine has an efficiency of 28 % and delivers 280 J of work per cycle per cylinder. A) If the engine runs at 25 cycles per second (1500 rpm), determine the work done per second. B)What is the total heat input per second from the gasoline. C) If the energy content of gasoline is 130 MJ per gallon, how long does one gallon last?
An engine does 20 J of work and exhausts 15 J of waste heat during each cycle. What is the engine's thermal efficiency? If the cold-reservoir temperature is 30 degrees C, what is the minimum possible temperature in degrees C of the hot reservoir?
A Carnot heat engine operates with a high pressure of 750°C. The engine rejects 200 MJ of heat every 30 minutes in a condenser operating at 150 kPa. How much power is produced by the heat engine and what heat input is required? Express your answers in kW.
A Carnot engine has an efficiency of 62 % and performs 2.3 times 10^4 J of work in each cycle. How much heat does the engine extract from its heat source in each cycle? Express your answer with the appropriate units. Suppose the engine exhausts heat at room temperature (20 0 degree C). What is the temperature of its heat source?