please post step by step explanation

Consider a heat exchanger where a hot low pressure (1 bar) combustion gas is used to produce high pressure steam (44 bar). The combustion gas ( 35 mole \% CO2,65 mole %N2 ) enters the heat exchanger at 1 bar and 650C and exits at 250C. The water enters the heat exchanger at 25C and 44bar and the high pressure steam exits at 235C. Ignore any pressure drop in the heat exchanger. (a) How many moles of steam can be produced per mole of combustion gas? Clearly state and justify all assumptions. [23] (b) Briefly explain the difference in approach between your approach in (a) and the approach of Aspen Plus to conduct the calculations required in (a). [2] Consider a heat exchanger where a hot low pressure (1 bar) combustion gas is used to produce high pressure steam (44 bar). The combustion gas ( 35 mole \% CO2,65 mole %N2 ) enters the heat exchanger at 1 bar and 650C and exits at 250C. The water enters the heat exchanger at 25C and 44bar and the high pressure steam exits at 235C. Ignore any pressure drop in the heat exchanger. (a) How many moles of steam can be produced per mole of combustion gas? Clearly state and justify all assumptions. [23] (b) Briefly explain the difference in approach between your approach in (a) and the approach of Aspen Plus to conduct the calculations required in (a). [2]