A gasoline engine has a thermal efficiency of 28 %. If the...

A gasoline engine has a thermal efficiency of $28 \%$. If the engine absorbs $2000 \mathrm{~J}$ of heat per cycle, $(\mathrm{a})$ what is the net work output per cycle? (b) How much heat is exhausted per cycle?

Labs

Want to see this concept in action?

NEW

Explore this concept interactively to see how it behaves as you change inputs.

View Labs

Key Concepts

Energy Conservation in Thermodynamic Processes

The principle of energy conservation, often expressed through the first law of thermodynamics, is crucial in analyzing heat engines. It states that the heat energy supplied to the engine must equal the sum of the net work done by the engine and the heat expelled. This balance is essential for evaluating engine performance and determining quantities like net work output and exhaust heat.

Thermal Efficiency

Thermal efficiency is a measure of how well a heat engine converts the absorbed heat into work. It is defined as the ratio of the net work output per cycle to the heat input per cycle. This concept is fundamental in thermodynamics because it indicates the effectiveness of energy conversion processes and highlights inherent limitations posed by the second law of thermodynamics.

Heat Engine Cycle

A heat engine cycle is a sequence of processes that an engine undergoes to absorb heat, perform work, and expel excess heat. This cycle demonstrates the conservation of energy, where the total heat input is partly converted into useful work while the remainder is released as waste heat. It forms the foundation for analyzing and understanding the performance of various engines and thermal systems.

Transcript

Please give Ace some feedback