How will the heat duty change if the reactor feed to the dehydrogenation reaction described in problem 7.6 consists of an equimolar stream of ethanol and nitrogen? Assume that other conditions—ethanol...

How will the heat duty change if the reactor feed to the dehydrogenation reaction described in problem 7.6 consists of an equimolar stream of ethanol and nitrogen? Assume that other conditions—ethanol feed rate, temperature, conversion—are the same as described in problem 7.6. The heat capacity of nitrogen in J/mol K is described by the following equation, where T is the temperature in K:

Problem 7.6

The standard enthalpies of formation of ethanol, acetaldehyde, and hydrogen in kJ/mol are -235.3, -166, and 0, respectively. What is the energy change for the dehydrogenation reaction described in problem 6.10? Is the reaction endothermic or exothermic? The reaction is conducted at 545 K, and the product gases are cooled to 360 K. What is the heat removal rate for a continuous reactor fed with 1 mol/s of pure ethanol? Assume that the ethanol conversion is 35%. The heat capacities of the three species in J/mol K are CP,ethanol : 87.5; CP,acetaldehyde : 55.2; CP,hydrogen : 29.