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# Air-standard Otto cycle

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At the beginning of a compression process of an air-standard Otto cycle, p1 = 1 bar, T1 = 290 K, V1 = 400 cm^3. The maximum temperature in the cycle is 2200 K and the compression ratio is 8. How do I determine the mass of air contained in the system, in kg, and the heat addition, in kJ? The internal energy at the end of the isentropic compression is 475.11 kJ/kg.

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Please see the attached file.

Otto cycle
The maximum temperature and pressure in an Otto cycle occur at the end of the constant volume heat addition process (state 3).

At state 1 (beginning isentropic compression)
T1= 290 K
P1= 1 bar = 100 kPa
V1 = 400 cm3 = 0.0004 (m3)
Also according ...

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