Determine the required flow rate in kgsec of low pressure

Question

Determine the right answer of the given question

Question- Ethylene and enough dry air (79 % N₂ and 21 % O₂) to supply 15% excess oxygen are fed to a reactor operated isothermally at 280ºC. The conversion of ethylene is 75% and the production rate of ethylene oxide (MW = 44.05 g/mol) is 10,000 kg/hour. Air, which is available at a temperature of -20°C, passes through a heat exchanger where its temperature is raised to 75°C.

RXN Stoich, C₂H₄ (g) + 1/2 O₂ (g) ---> CH₂CH₂ (g)

Part 1- Determine the required flow rate (in kg/sec) of low pressure steam (P = 1 bar, T = 200°C) required in the heat exchanger if all of the steam fed condenses isobarically.) <-----ONE question

I want experts help to calculate the required flow rate of low pressure steam.