3. For the isothermal gas phase pyrolysis reaction → C2H6 C2H4 + H2 Pure ethane enters a plug flow reactor at 6 atm and 1100 K. The reaction is first order in ethane with a rate constant of 0.1 1/s. Determine the volume of reactor required to achieve a conversion of 80%. 4. If the reaction in problem 3 were performed in a 500 L rigid batch reactor, how long would it take to achieve a conversion of 90%?