Answered: Q2 Calculate the total entropy change…

Q2 Calculate the total entropy change when: (a) A block of heat capacity of 200 J/K at 100 °C is placed in a lake at 20 °C. (b) Two such blocks at 127 °C and 27 °C are joined together.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

See similar textbooks

Similar questions

1 x 106 cm3 of oxygen at a pressure of 10 bar and temperature 300°C, expands 10 times its original volume and its final temperature will be 25°C. Calculate (i) mass (ii) change in entropy by considering temperature, volume, entropy relationship (iii) change in entropy by considering temperature, pressure, entropy relationship (iii) change in entropy by considering pressure, volume, entropy relationship.
A vessel contains 2 kg of water at 80 ºC. Determine specific and total internal energy,specific and total enthalpy, and specific and total entropy. Consider different cases/states:I. P = Psat and x = 0II. P = Psat and x = 0.3III. P = Psat and x = 1Plot these states on the Pv diagram and label magnitudes. Refer property tables. Explain with clear writing and units and diagram Also if you use tables and equation mention it with explanation
Q4: A. An ideal gas initially at 30°C undergoes an isobaric expansion at 3kpa. If the volume increases from 1.5 to 3.5 m3 and 13 kJ is transferred to the gas by heat, what are (a) the change in its internal energy and (b) its final temperature?
An ideal gas is compressed from a volume of V, = 6.00 L to a volume of V, = 3.00 L while in thermal contact with a heat reservoir at T = 295 K as in the figure below. During the compression process, the piston moves down a distance of d = 0.145 m under the action of an average external force of F = 21.0 kN. (a) Find the work done on the gas. kJ (b) Find the change in internal energy of the gas. k) (c) Find the thermal energy exchanged between the gas and the reservoir. kJ (d) If the gas is thermally insulated so no thermal energy could be exchanged, what would happen to the temperature of the gas during the compression? O The temperature would decrease. O The temperature would remain constant. O The temperature would increase.
In the given figure pressure p, in kPa, is Water Hg(S = 13.6) %3D 30cm
Oxygen with mass m = (0.08kg) in V1 volume has transformed into V2 = (V1 / 4) by isothermal compression. Later, oxygen was heated at constant pressure and its volume turned into V3 = (5V2). Plot this process on a p-V graph and calculate the total entropy change. (consider oxygen the ideal gas.) (molar heat capacity of oxygen at a constant volume Cv = (5/2) R)
3) A cup of rather dilute hot tea initially at 140 degrees F is served to a customer at Howard Johnson's. Unfortunately, before they get around to drinking it, it has spontaneously cooled off to 200 0 100 degrees F. Calculate the change in this process. The temperature of the entropy of the universe for restaurant (the surroundings) is 70 degrees F. (DHD 2/6/22) Suppose that the heat has problem 3, in order to save the inside temperature is been turned off in the HoJo's in money in the cold winter months, and 32 degrees F. The hot tea cools from HOWARD 140 degrees F to 32 degrees F, and then freezes, making it JOHNSON'S impossible to drink. What is the change in entropy of the universe in this case? (DHD 2/6/22) LCE CREAM 28 FLAVORS Restaurant Return to problem 3. Suppose that our customer complains about the cold tea and is given a second cup of hot tea. Feeling especially hungry (for tea?) they mix the hot tea and the cold tea together so that they will have twice as much tea (albeit…
3.5 kg of water are present in a saturated liquid-vapor filling a container whose volume is 1.5 m^3 at a temp of 30 C. What is the pressure value inside the container? Calculate quality x. Calculate the entropy.
Saturated water vapor at 85 ° C comes out of a turbine and condenses on the outer surface of a cooling pipe 2 in diameter and 20 m long at a rate of 90 kg / hr. Find the rate of heat transfer from the steam to the cooling pipe.