# Frequent question: Why Carnot engine is most efficient?

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According to the Carnot theorem, the reversible engine will always have a greater efficiency than the irreversible one. … The Carnot cycle achieves maximum efficiency because all the heat is added to the working fluid at the maximum temperature.

## How do you proof that Carnot engine is most efficient?

It seems that the only condition used in proving that the Carnot engine is the most efficient is that it is reversible. More specifically, the Carnot engine can be run in reverse as a refrigerator. Furthermore, it is asserted that all reversible engines will have the same efficiency.

## Is Carnot engine efficient?

Carnot heat engine is a theoretical engine that operates on a reversible carnot cycle. It has maximum efficiency that a heat engine can possess.

## What is Carnot engine What is its efficiency?

The efficiency of a Carnot engine is defined as ratio. of net mechanical work done per cycle by the gas to. the amount of heat energy absorbed per cycle from. the source.

## Is Carnot cycle the most efficient?

The Carnot cycle is a theoretical cycle that is the most efficient cyclical process possible. Any engine using the Carnot cycle, which uses only reversible processes (adiabatic and isothermal), is known as a Carnot engine. Any engine that uses the Carnot cycle enjoys the maximum theoretical efficiency.

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## Why is the efficiency of Carnot engine less than 100%?

In order to achieve 100% efficiency (η=1), Q2 must be equal to 0 which means that all the heat form the source is converted to work. Hence negative temperature of absolute scale is impossible and we cannot reach absolute 0 temperature. …

## Which of the following engine is the most efficient?

Steam engine:-On the Rankine cycle, which has a maximum Carnot efficiency of 63 percent for practical engines, steam engines and turbines operate with steam turbine power plants capable of achieving efficiency in the mid 40 percent range. The boiler was considered part of the engine in the earliest steam engines.

## What is a Carnot engine What is its efficiency on what factors the efficiency of the Carnot engine depends?

The efficiency of a Carnot engine depends solely on the temperatures of the hot and cold reservoirs. Carnot’s theorem states that all heat engines between two heat reservoirs are less efficient than a Carnot heat engine operating between the same reservoirs.

## What is the efficiency of Carnot cycle *?

It is well known that the Carnot cycle efficiency ( η thermal = 1 − T L T H ) is maximized with the highest possible heat source temperature TH and the lowest possible heat sink temperature TL.