In the ?gure is shown the Otto cycle. Paths A and C are adiabatic (Q = 0), and p

Question

In the ?gure is shown the Otto cycle. Paths A and C are adiabatic (Q = 0), and paths B
and D are at constant volume (?V = 0). Consider the working substance of this engine
to be an ideal gas. For each path, indicate on the chart below whether the work W done
on the gas is positive (+), negative (?), or zero (0). Also indicate the sign of the net
work for the entire cycle. Repeat for the heat Q put into the gas, and the change of
internal energy ?Eint of the gas.

Explanation / Answer

for A --------->work done is +ve for B ----------->work done = 0 for C ---------->work done = -ve for D ---------->work done = 0 net work done is +ve

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