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    CHE144-Tutorial 6 PDF

    Uploaded by

    Nurainul Kamalia
    This document contains 6 practice problems for a thermodynamics tutorial. Problem 1 asks about the specific enthalpy of R-134a in a container. Problem 2 asks about the rate of evaporation of water being boiled on an electric burner. Problem 3 asks about the volume and pressure of air in two connected tanks reaching equilibrium. Problem 4 asks about the volume, temperature, pressure, and energy change of water in a tank undergoing a phase change. Problems 5 and 6 ask about sketching processes and calculating work done on piston-cylinder systems containing water and air respectively undergoing pressure and temperature changes.

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    Download as PDF, TXT or read online from Scribd

    CHE144-Tutorial 6 PDF

    Uploaded by

    Nurainul Kamalia
    53 views1 page
    This document contains 6 practice problems for a thermodynamics tutorial. Problem 1 asks about the specific enthalpy of R-134a in a container. Problem 2 asks about the rate of evaporation of water being boiled on an electric burner. Problem 3 asks about the volume and pressure of air in two connected tanks reaching equilibrium. Problem 4 asks about the volume, temperature, pressure, and energy change of water in a tank undergoing a phase change. Problems 5 and 6 ask about sketching processes and calculating work done on piston-cylinder systems containing water and air respectively undergoing pressure and temperature changes.

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    CHE144-Tutorial 6.pdf

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    This document contains 6 practice problems for a thermodynamics tutorial. Problem 1 asks about the specific enthalpy of R-134a in a container. Problem 2 asks about the rate of evaporation of water being boiled on an electric burner. Problem 3 asks about the volume and pressure of air in two connected tanks reaching equilibrium. Problem 4 asks about the volume, temperature, pressure, and energy change of water in a tank undergoing a phase change. Problems 5 and 6 ask about sketching processes and calculating work done on piston-cylinder systems containing water and air respectively undergoing pressure and temperature changes.

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    53 views1 page

    CHE144-Tutorial 6 PDF

    Uploaded by

    Nurainul Kamalia
    This document contains 6 practice problems for a thermodynamics tutorial. Problem 1 asks about the specific enthalpy of R-134a in a container. Problem 2 asks about the rate of evaporation of water being boiled on an electric burner. Problem 3 asks about the volume and pressure of air in two connected tanks reaching equilibrium. Problem 4 asks about the volume, temperature, pressure, and energy change of water in a tank undergoing a phase change. Problems 5 and 6 ask about sketching processes and calculating work done on piston-cylinder systems containing water and air respectively undergoing pressure and temperature changes.

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    of 1

    CHE144/SEM OCT 20- FEB 21/TUTORIAL

    Universiti Teknologi Mara

    Cawangan Johor Kampus Pasir Gudang

    TUTORIAL 6

    1) A 9 m3 container is filled with 300kg or R-134a at 10 oC. What is the specific enthalpy
    of the R-134a in the container?

    2) Water is to be boiled at sea level in a 30-cm diameter stainless steel pan placed on top of
    a 3kW electric burner. If 60 percent of the heat generated by the burner is transferred to
    the water during boiling, determine the rate of evaporation of water?

    3) A 1 m3 tank containing air at 10 oC and 350 kPa is connected through a valve to another
    tank containing 3 kg of air at 35 oC and 200 kPa. Now the valve is opened, and the entire
    sytem is allowed to reach thermal equilibrium with the surroundings, which are at 20 oC.
    Determine the volume of the second tank and the final equilibrium pressure of air.

    4) A rigid tank initially contains 1.4kg saturated liquid water at 200 oC. At this state, 25
    percent of the volume is occupied by water and the rest by air. Now heat is supplied to
    the water until the tank contains saturated vapor only. Determine:

    a) Volume of the tank

    b) The final temperature and pressure

    c) The internal energy change of the water

    5) Water initially at 200 kPa and 300 oC is contained in a piston-cylinder device fitted with
    stops. The water is allowed to cool at constant pressure until it exists as a saturated vapor
    and the pistons rests on the stops. Then the water continues to cool until the pressure is
    100 kPa.

    a) Sketch T-v diagram

    b) Find the overall change in internal energy between the initial and final states per unit
    mass of water.

    6) A piston–cylinder device initially contains 0.4 m3 of air at 100 kPa and 80°C. The air
    is now compressed to 0.1 m3 in such a way that the temperature inside the cylinder
    remains constant. Determine the work done during this process.
    “If you aren’t willing to work for it. Don’t complain about not having it”
    Unknown-

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