How do you find the heat rejected by a carnot engine?

To find the work done, use the formula giving relation between work done, efficiency and heat absorbed. Substitute the values and obtain the amount of work done. Now, subtract the heat absorbed from the work done. This will give the amount of heat rejected per cycle.

Why do heat engines reject heat?

This is because of the cylinder you use. As soon as you burn some fuel, the metal will absorb some heat & will reject it out. This is the reason why you should not touch you vehicle’s engine after use. Even air inside the cylinder will store some amount of heat in it.

Why carnot engine is not possible?

The conceptual value of the Carnot cycle is that it establishes the maximum possible efficiency for an engine cycle operating between TH and TC. It is not a practical engine cycle because the heat transfer into the engine in the isothermal process is too slow to be of practical value.

Is it possible to have a heat engine functioning with a Carnot cycle?

The second law of thermodynamics can be restated in terms of the Carnot cycle, and so what Carnot actually discovered was this fundamental law. Any heat engine employing the Carnot cycle is called a Carnot engine. What is crucial to the Carnot cycle—and, in fact, defines it—is that only reversible processes are used.

How is the Carnot efficiency of a heat engine calculated?

Note: Unlike the earlier equations, the positions of T cold and T hot are reversed. The Carnot Efficiency is the theoretical maximum efficiency one can get when the heat engine is operating between two temperatures: The temperature at which the high temperature reservoir operates ( T Hot ).

Which is the best description of the Carnot engine?

Carnot engine is a theoretical thermodynamic cycle proposed by Leonard Carnot. It gives the estimate of the maximum possible efficiency that a heat engine during the conversion process of heat into work and conversely, working between two reservoirs, can possess.

Where does the Carnot cycle take place in a heat engine?

The cycle takes place between a hot reservoir at temperature T H and a cold reservoir at temperature T C. The vertical axis is temperature, the horizontal axis is entropy. The Carnot cycle when acting as a heat engine consists of the following steps:

What happens when the heat sink is removed from a Carnot heat engine?

During this step, the surroundings continue to do work to further compress the gas and both the temperature and pressure rise now that the heat sink has been removed. This additional work increases the internal energy of the gas, compressing it and causing the temperature to rise to TH. The entropy remains unchanged.