Consider the air-standard Otto cycle described in Problem 9.94. A particular cycle operates with a compression ratio of 7:1 and has a heat input of 2100 kJ/kg. The pressure and temperature at maximum volume before compression (state 1) are 100 kPa and 15°C, respectively. Determine the net work produced by the cycle.

Problem 9.94

1-2 : Internally reversible, adiabatic compression from the maximum volume V_max to the minimum volume V_min.

2-3 : Constant-volume heat addition to a peak cycle temperature T₃.

3-2 : Internally reversible, adiabatic expansion from V_min to V_max.

4-2 : Constant-volume heat rejection to return to the initial state.

Sketch this cycle using P–V and T–S coordinates, labeling each state point (1, 2, 3, and 4).