In an ideal Otto cycle, air is compressed from 1.20 kg/m and 2.2 L to 0.26 L and the net work output of the cycle is 440 kJ/kg. The mean effective pressure for the cycle is?

An ideal Otto cycle has a compression ratio of 10.5, takes in air at 90 kPa and , and is repeated 2500 times per minute. Using constant specific heats at room temperature, determine the thermal efficiency of this cycle and the rate of heat input if the cycle is to produce 90 kW of power.

Thermodynamics Question

See figure attached

1. An Atkinson cycle has state 1 as 150 kPa, 300
K, a compression ratio of 9, and an expansion ratio
of 14. Find the mean effective pressure. 

At the beginning of the compression process of an air standard otto cycle. P1= 1 bar, T1= 290k and V1= 400cm^3. The max Temperature in the cycle is 2200 K and the compression ratio is 8.

Determine

A) the heat addition in KJ

B) the Net-work in kJ

c) the thermal efficiency