Steam locomotives have an efficiency of 15.0% and operate with a hot steam temperature of 425°C. (a) What would the cold reservoir temperature (in °C) be if this were a Carnot engine? °c (b) What would the maximum efficiency of this steam engine be if its cold reservoir temperature were 150°C?

Problem 5:   Suppose a Carnot engine has an efficiency of 45 % and a cold reservoir temperature of 28.5°C. Part (a)  What is the hot reservoir temperature, in degrees Celsius, of this Carnot engine?  Part (b)  What must the hot reservoir temperature be, in degrees Celsius, for a real heat engine that has an efficiency of 45, which is 70% of the maximum efficiency? Assume it has the same cold reservoir, at 28.5°C.

In one cycle a heat engine absorbs 520 J from a high-temperature reservoir and expels 310 J to a low-temperature reservoir. If the efficiency of this engine is 57% of the efficiency of a Carnot engine, what is the ratio of the low temperature to the high temperature in the Carnot engine? Tlow Thigh  =

How much energy must be transferred as heat for a reversible isothermal expansion of an ideal gas at 132°C if the entropy of the gas increases by 46.0 K

(a) What is the hot reservoir temperature (in degrees C) of a Carnot engine that has an efficiency of 40.0% and a cold reservoir temperature of 32.5°C ? °C (b) What must the hot reservoir temperature (in degrees C) be for a real heat engine that achieves 0.750 of the maximum efficiency, but still has an efficiency of 40.0% (and a cold reservoir at 32.5°C )? °C

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.