Focus on questions 1 and 2. Elementary Principles of Chemical Processes

1. What is the change in internal energy when 30kg mol of air are cooled from 50C to 10C in a constant volume process? 2. Ten pounds of CO2 at room temperature (80F) are stored in a fire extinguisher that has a volume of 4.0ft3. How much heat must be transferred from the extinguisher so that 40% of the CO2 becomes liquid? 3. The figure below shows a hot gas stream at 500C being cooled to 300C by transferring heat to the liquid water that enters at 20C and exits at 213C. Assume that the heat exchanger is insulated. Calculate the mass flow rate of water that is needed to achieve this cooling of the hot gas stream