The compression ratio of the ideal Otto cycle working with air is 8. The highest and lowest temperatures of the cycle are 1625K and 315K, respectively. Considering the variation of specific heat with temperature, calculate a) the heat supplied to the cycle, b) the thermal efficiency of the cycle, c) the efficiency of a Carnot cycle operating between the same temperature limits.

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IC engines

The term "engine" indicates a mechanical device/machine used to convert input energy to a specific mechanical output. The input energy may be in the form of chemical energy, thermal energy, or so on and mechanical output is in the form of mechanical energy (work done). Generally, the engines classify into two groups which are internal combustion type and external combustion type, and further, these two types can be classified into two types that are reciprocating and rotary engines.