In an Otto cycle, air at (15^{circ} mathrm{C}) and 1 bar is compressed adiabatically until the pressure
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In an Otto cycle, air at \(15^{\circ} \mathrm{C}\) and 1 bar is compressed adiabatically until the pressure is 15 bar. Heat is added at constant volume until the pressure rises to 40 bar. Calculate
(a) the air-standard efficiency,
(b) the compression ratio, and
(c) the mean effective pressure for the cycle. Assume \(c_{V}=0.718 \mathrm{~kJ} / \mathrm{kg} . K, \gamma=1.4\) and \(R=8.314 \mathrm{~kJ} /\) kmol.K.
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