Ethylene is the largest single chemical commodity in the world. It is the precursor for polyethylene, the most common form of plastic. One method for producing ethylene is to "crack" ethane using high temperature steam. C2H6C2H4+H2 Successful cracking requires that the ethane reach a temperature of 800-900 [C]. Assume that pure ethane flows into a cracking unit at 75[C] and that the fractional conversion of ethane in the unit is 80%, and that the outlet temperature is 800[C]. How much heat is required to produce 1,000[kg] of ethylene? Compare both the heat of reaction and heat of formation method. For this reaction, hr=137kJ/(molC2H4)