Question

from the carnot heat engine also prove heat absorbed by the engine in first step, is more then the work done by the engine in complete cycle​

Answer 1

Answer:

All standard heat engines (steam, gasoline, diesel) work by supplying heat to a gas, the gas then expands in a cylinder and pushes a piston to do its work. So it’s easy to see how to turn heat into work, but that’s a one shot deal. We need it to keep repeating to have a useful engine. The heat and/or the gas must therefore be dumped out of the cylinder before the next cycle begins, otherwise all the work the gas delivered on expanding will be used up compressing it back!

Our aim in this lecture is to figure out just how efficient such a heat engine can be: what’s the most work we can possibly get for a given amount of fuel in a cyclical process? We’ll examine here the model stripped to its essentials: an ideal gas is enclosed in a cylinder, with external thermal connections to supply and take away heat, and a frictionless piston for the gas to perform (and if necessary absorb) mechanical work:

Explanation:

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