Reference no: EM13712328
1) Four kilograms of water initially at 200 degree Celsius and 0.5 MPa undergo an isothermal, internally reversible compression process to the saturated liquid state.
Determine the work and heat transfer involved in the process (in kJ). Sketch the process on P?v and T?s coordinates. Associate the work and heat transfer with the areas on these diagrams.
2) Seven kilograms of air is contained in a constant? volume tank with 327 degree in Celsius and 120 kPa. Then it is cooled to ambient temperature (27 Celsius).
Determine the entropy change of the air and universe due to the process and sketch the process on the T?s diagram.
3) Two kilograms of water execute a Carnot power cycle. During the isothermal expansion, the water is heated until it is a saturated vapor from an initial state where the pressure is 40 bar and the quality is 15%. The vapor then expands adiabatically to a pressure of 1.5 bar while doing 491.5 kJ/Kg of work.
(a) Sketch the cycle on P?V coordinates.
(b) Evaluate the heat and work for each process, in kJ.
(c) Evaluate the thermal efficiency.
|
How logistics management must evolve to reflect
: Discuss how logistics management must evolve to reflect the differing needs for each stage of international development - discuss the logistics operational considerations for operating in a global environment.
|
|
Isothermal heat problem
: A Carnot heat engine using 1 kg of air has the following conditions: isothermal heat. Addition beginning at 15 MPa and 1200 K and continuing until the pressure is 10 MPa;
|
|
What is the maximum stress amplitude possible for lifetime
: For a shaft of 1045 steel rotating at 1,200 rpm and under a transverse load, what is the maximum stress amplitude possible for the lifetime of 1 year of continuous operation?
|
|
A very rough plate is placed in water
: A very rough plate is placed in water. The plate is held constant at a temperature of Ts = 350K, and water flows over the plate at Tinfinity = 300 K. It is desired that the heat lost from the upper surface of the plate be q'' = 1.2 MW/m2. If the plat..
|
|
Determine the work and heat transfer involved in the process
: Four kilograms of water initially at 200 degree Celsius and 0.5 MPa undergo an isothermal, internally reversible compression process to the saturated liquid state. Determine the work and heat transfer involved in the process (in kJ). Sketch the proce..
|
|
Models do not necessarily have to be physical objects
: Models do not necessarily have to be physical objects. They can be two-dimensional drawings or even mental constructs. Cite one or more examples of such models encountered outside of chemistry. Can you think of models that are used in your own..
|
|
Consider an electron in first bohr orbit of hydrogen atom
: Consider an electron in the first Bohr orbit of a hydrogen atom. What is the radius (in meters) of this orbit? What is the total energy (in eV) of the electron in this orbit?
|
|
Rotational speed of the driven sheave as well as belt speed
: A v-belt drive system consists of a 12.4" diameter driving sheave and a 21.1" diameter driven sheave connected by a 5V belt. if the center distance is to be no more than 38" specify the longest possible standard belt that can be used and what the res..
|
|
Silicone rubber has a poissons ratio
: Silicone rubber has a Poisson’s ratio of 0.4 Consider a silicone rubber drain hose for a surgical procedure. The hose has an outer diameter of 4mm and a wall thickness of 0.5mm. How much does the lumen of the catheter constrict if the hose is stretch..
|