The power output of a car engine running at is . How much (a) work is done and (b) heat is exhausted per cycle if the engine's thermal efficiency is ? Give your answers in .
(a) Work done per cycle
(b)Heat exhausted per cycle
The fraction of heat, , converted to work W is denoted by the thermal efficiency, . It is expressed as follows.
The energy input is split between the mechanical energy required to move the car and the heat released into the environment:
2400 rpm per second.
And work per cycle is
Thermal efficiency iis the proportion of work gained to energy invested.
As a result, the total energy input per cycle must be
The heat lost during one cycle is equal to the difference between the energy input and the work done:
A heat engine uses a diatomic gas that follows the cycle in FIGURE P.
a. Determine the pressure, volume, and temperature at point
b. Determine , and
for each of the three processes. Put your results in a FIGURE P table for easy reading.
c. How much work does this engine do per cycle and what is its thermal efficiency?
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