Three test tubes containing water. The first test tube containing 10 gm water at 25 °C, second test tube contains 20 gm of water at 50 °C and the third test tube contains 30 gm of water at 80 °C. When they come in contact in such a way so that heat is exchanged between the waters in the test tubes, but no heat is exchanged between the test tubes and the atmosphere/environment. Determine the final temperature of the water, entropy change of each of the water in the test tubes and total entropy change. Consider the C, of water = 1 cal/gm/°C and the test tube material doesn't have ant heat capacity.

Three test tubes containing water. The first test tube containing 10 gm water at 25 °C, second test tube contains 20 gm of water at 50 °C and the third test tube contains 30 gm of water at 80 °C. When they come in contact in such a way so that heat is exchanged between the waters in the test tubes, but no heat is exchanged between the test tubes and the atmosphere/environment. Determine the final temperature of the water, entropy change of each of the water in the test tubes and total entropy change. Consider the C, of water = 1 cal/gm/°C and the test tube material doesn't have ant heat capacity.

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

Determine change in specific entropy of the ideal gas from state 1 to state 2 in kJ/kg K
1.56 moles of an ideal gas is placed in a piston and is subjected to the following changes. (a) The piston is locked so that the volume of the gas does not change, and is then cooled slowly (and reversibly!) from a temperature of 400 K to 300 K. What is the change in entropy, AS (in J/K), for this process? This is an example of an isochoric cooling process. (b) The external pressure around the piston is adjusted to match the internal pressure of the gas inside. The piston is now insulated from the surroundings (i.e. no heat exchange) and is unlocked. The external pressure is slowly (and reversibly!) increased allowing adiabatic contraction of the gas inside until its temperature has returned to 400 K. What is the change in entropy (in J/K) for this process? (c) What is the total change in entropy (in J/K) for these two processes, and in what way(s) are the physical properties of the gas (P, V, and 7) different between the starting point and the end point? (You may find it useful to…
A piston-cylinder assembly contains 5 kg of saturated water vapor at a pressure of 3 MPa. At the end of the change of State, heat is given out of the cylinder at constant pressure until the water vapor is completely condensed, so that the liquid remains saturated at a pressure of 3 MPa in the wipe - dirde. During this state change, what happens to the fog - min entropy change?(a) 0 kJ / K (d) -17.7 kJ/K(b) - 3.5 kJ / K (e) -19.5 kJ/K(c) -12.5 kJ / K
Helium (1.9 kg) is being stored in a rigid tank at 21 deg C. The tank is set outside and the temperature increases to 26 deg C. what is the change in entropy? (Report answer to three decimal places)
A vessel contains 10N 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.
The entropy of the system can be determined by integration from
H.W: (1) An insulated piston-cylinder device contains 5 L of saturated liquid water at a constant pressure of 150 KPa. An electrical resistance heater inside the piston is turned on now and electrical work done on steam is 2200 W. Find: (a) initial and final temperature of water (T1 and T2), (b) the work done during this process (W1-2 ), (c) the entropy change of water and show if the process is possible or not, and (d) plot P-V and T- s diagrams.
A vessel contains 10 kg of water at 200 kPa. Determine pressure, specific and total internalenergy, specific and total enthalpy, and specific and total entropy. Cosider 5 differentcases/states:I. T = 30 ⁰C II. III. IV. V. T = Tsat and x = 0T = Tsat and x = 0.5T = Tsat and x = 1T = 500 ⁰C Plot these states on the Tv diagram and lable magnitudes. Refer property tables
850 g of a certain substance is heated at constant pressure from 40 ⁰C to 70 ⁰C. Specific heat capacity at constant pressure is given by the following expression: 8Cp² - 5Cp = 7 Where: Cp = specific heat capacity at constant pressure in kJ/kg-K Determine the change in entropy in J/K.
Liquid water is subjected to some process between an initial state of P1 = 52 psi, T1 = 43°F and a final state of P2 = 100 psi, T2 = 55°F. Determine the change in specific entropy, As12 (Btu/lbm-°R). Your Answer:
steam at a temperature of 250 degree celsius has a specific volume of 1.5436 meter cube/ kg. what are the pressure, specific internal energy, enthalpy, and entropy?
A rigid tank of volume 10 m³ initially contains saturated water vapor at a temperature of 120 °C. Steam at a pressure 1.2 MPa and a temperature of 400 °C enters the tank through a valve in steam line that is connected to the tank until the final pressure in the tank is 800 kPa, at which time the temperature is 200 °C. All kinetic and potential energy effects can be neglected. A schematic of the problem and properties at all state points except state 1 are shown in the figure below. All of the properties at state 2 and the inlet state i are provided on the figure. Initial State in Tank T₁-120 °C, Sat. vapor u₁=? kJ/kg V₁=? m³/kg Pi=1.2 MPa, Ti-400 °C hi=3261.3 kJ/kg V=10 m³ Final State in Tank T₂-200 °C, P₂-800 kPa u₂=2631.1 kJ/kg v₂=0.26088 m³/kg Qout