A 5 kg of water at temperature of 47°C is mixed with the 5 kg of water at 77°C. Find the change in entropy of universe. Consider that the specific heat of water at constant pressure is 4.2 kJ/kg. Answer Choices: a) 4.73 kJ/K b) 7.62 kJ/K c) 1.33 kJ/K d) 2.352 kJ/K

A 5 kg of water at temperature of 47°C is mixed with the 5 kg of water at 77°C. Find the change in entropy of universe. Consider that the specific heat of water at constant pressure is 4.2 kJ/kg. Answer Choices: a) 4.73 kJ/K b) 7.62 kJ/K c) 1.33 kJ/K d) 2.352 kJ/K

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

Initially, 10 kg of water is in a weighted piston-cylinder device at a pressure of300 kPa and an internal energy of 2156 kJ/kg. Heat is then added until thevolume doubles. Calculate:a) The initial temperature of the water.b) The initial volume of the cylinder.c) The temperature of the water at the final state.d) The internal energy of the water at the final state.
When we add the heat at constant pressure to a gas then - A) only its temperature will rise B) only its pressure will rise C) only its volume will rise D) its temperature will rise and it will do external work as well
Q5. An ideal gas occupies a volume of 0.5 m³ at a temperature of 340 K and a given pressure. The gas undergoes a constant pressure process until the temperature decreases to 290 K. Determine a) The final volume, b) The work, if the pressure is 120 kPa.
5. Steam with a specific volume 0.09596 m/kg undergoes a constant pressure process at 1.70 MPa until the specific volume becomes 0.13796 m'/kg. What are (a) the final temperature, (b) change in internal energy c) W d) Change in entropy and e) Q?
1) Air is compressed under Constant Entropy Process from 10 Psia, 3 ft3, 90°F to 50 Psia. Find the following: a) Final volume in ft3. b) Final temperature in °F. c) Work non-flow in BTU. 2) From problem #1 Use all PVT values, What if the 1lbm of air is compressed under quasi-static process (n=1.27). Find the following: a) Work non-flow in BTU. b) Heat in BTU.
A piston-cylinder assembly with a linear spring acting on the piston as shown below contains the refrigerant R-134a at 15°C with a quality of x=0.6 in a control volume of V= 0.02 m³. The R-134a is heated up to 60°C at which point the specific volume is v= 0.03002 m³/kg. Po = 101.3kPa a) Determine the final pressure. b) Determine the final volume. c) Determine the work in the process. d) Determine the heat transfer in the process e) Draw a p-v diagram to qualitatively show the process f) Are there any parameter(s) missing for the calculation of the linear spring constant? if so, which one(s)? develop an equation to calculate the linear spring constant Po R-134a
In the Piston-cylinder Assembly, water in the form of hot steam with a mass of 1 kg at a pressure of 500 kPa and a temperature of 500°C is first cooled to a temperature of 120°C in a constant volume, and then condensed by cooling until the water becomes a saturated liquid at a constant temperature.a) draw a T-v diagram of state changesb) find the work done throughout the state changes.c) find the heat transfer from the piston cylinder Assembly to the environment.Note: changes in kinetic and potential energies are negligible.
energy of he inder, pisto). B) Derive the work expression during the polytropic process (Pv," =Pv,"-Constant) of an ideal gas. Q. No. 2: (5 marks) A system is composed of a stone having a mass of 10 kg and a bucket containing 100 kg of water, Initially
mple 4.1 A stationary mass of gas is compressed without friction from an ini- tial state of 0.3 m' and 0.105 MPa to a final state of 0.15 m and 0.105 MPa, the pres- sure remaining constant during the process. There is a transfer of 37.6 kJ of heat from the gas during the process. How much does the internal energy of the gas change? 3 3
A change of the system temperature, AT, can be: a) positive, b) negative, c) of any sign or zero.
QUESTION(S) A 2 m³ rigid tank contains water. Initially, 10 L of this water is in saturated liquid phase. The remaining volume of the tank is filled with saturated vapor. The pressure inside the tank is 2 Bar. Based on this information: d) The tank is now heated until the pressure inside is 8 Bar. Find the final temperature of water and the total heat input required for this process. Note: Take water as pure substance.
please help me answer this question with complete solution, with units, and figure. i promise to give high rating, thank you very much.