Estimate the heat of vaporization of diethyl either normal boiling point using troutons rule and Chen's rule and compare the results with a tabulated value of this quantity. Calculate the percentage error that results from using each estimation. The estimate the change in the heat of vaporization at 100°c using the Watson correlation.

05: Acetylene gas (C₂H₂) at 25 °C is burned during a steady-flow combustion process with 30 percent excess air at 27 °C. It is observed that 75x10³ kJ of heat is being lost from the combustion chamber to the surroundings per kmol of acetylene. Assuming combustion is complete, determine the exit temperature of the product gases.

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3. In an adiabatic cooling tower 500 kg/min hot water, is to be cooled from 50°C to 35°C by using air with 25°C dry bulb temperature and 15°C wet bulb temperature. The air leaves the tower with 32°C dry bulb temperature and 85% relative humidity. a. Show the points of inlet and outlet air on the PSYCHROMETRIC chart given below. Read the followings: Absolute humidity and Relative humidity of the inlet air. Absolute humidity and wet bulb temperature of the exit air. b. Calculate the volumetric flow rate of the air used. c. Why do we use cooling towers in process plant?

Water and mercury are mixed together in a well-insulated container. Use the values in the table below to answer the questions. Substance Mass, kg Ср J/kg-K Tinital, °C Hg 22 140 water 1.5 4,180 90 a. What is the final temperature in the vessel in ° C? b. What is AS for the water in J/K? c. What is AS for the mercury in J/K? d. What is the total AS for the process in J/K and what does that tell you?

Why does the  temperature remains the same at  0°C from1-3minutes ,event hough energy is being added the entire time?