Problem 7 During the working stroke of an engine th transferred out of the system was 150 kJ/ the working substance. If the work done b engine is 250 kJ/kg, determine the change internal energy and state whether it is

A Carnot engine whose high-temperature reservoir is at 620 K takes in heat at a rateof 550 W and rejects it to the low-temperature reservoir at 335 W. a) What is the rate itdoes work at? b) What is the temperature of the low-temperature reservoir?

Steam locomotives have an efficiency of 22.0% and operate with a hot steam temperature of 528 C. What would the cold reservoir temperature be if this were a Carnot engine? What would the maximum efficiency of this steam engine be if its cold reservoir temperature were 125 C.

In a Carnot cycle if the heat added is 570 J and the heat rejected is 180 J then what is the work net? O 570 J O 3.17 J O 390 J

During one full engine cycle: 1. 60 J of work are done on the system  2. 200 J of heat are added to the system 3. 90 J of work are done by the system  How much energy is lost as heat over the cycle?

Problem #8 In one cycle of an engine, 1.80 kJ of energy is absorbed from a hot reservoir at 280°C, and 1.15 kJ of energy is expelled to a cold reservoir at 25.0°C. a) How much work (in J) is done by the engine in each cycle? b) What is the engine's efficiency? c) How does this compare to the Carnot Efficiency?

QUESTION 4 In a single cycle, heat engine extracts 8.00 kcal of heat from a hot reservoir and exhausts 5.00 kcal of heat int a cold reservoir. What is the efficiency of this engine? а. 67.5% b. 77.5% C. 57.5% d. 47.5% е. 37.5%