A piston-cylinder assembly initially contains 25 kg of liquid water at a temperature of 40 °C and a pressure of 400 kPa. This system is heated under constant pressure and the temperature is increased up. to 350 oC. a) Show the system according to 1-2 phase changes in T-v diagram. b) Find the amount of heat required to be given to the system in kJ.

A piston-cylinder assembly initially contains 25 kg of liquid water at a temperature of 40 °C and a pressure of 400 kPa. This system is heated under constant pressure and the temperature is increased up. to 350 oC. a) Show the system according to 1-2 phase changes in T-v diagram. b) Find the amount of heat required to be given to the system in kJ.

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

Assignment #4 A closed container of water is at 700kPa. The mass of the saturated liquid is 1.78 kg, and the mass of the saturated vapor is 0.22 kg. Heat increases the pressure to 8 MPa. a) Find the final temperature, enthalpy and internal energy. b) Plot this process on a T-v diagram. (Ans: 362°C, 3024 kJ/kg, 2776 kJ/kg)
1. A rigid tank contains 2 kg of nitrogen at 27°C. The temperature rises to 127°C by heat transfer to the system. Find the heat transfer and the ratio of the final pressure to the initial pressure.
2.0 lb of water inside a piston-cy inder assembly undergoes the following two processes in series Process 1-2: Contant pressure cooling from a saturated vapor at p1 = 170 psi until x2 = 80%. Process 2-3: Constant volume heating to a saturated vapor. There are no changes in kinetic or potential energy. a) Find the specific volume for state 1 in ft3/lb. b) Find the specific volume at state 2 in At3/b c) Find the work for process 1-2 in Btu. d) Find the heat transfer for process 1-2 in Btu. e) Find the work for process 2-3 in Btu. f) Find the heat transfer for process 2-3 in Btu.
1. Nitrogen at 200 psig is used to fill tank of 120 in³. The filling process is very slow and the contents of the tank attain 73°F. Find the mass of nitrogen, in Ib, inside the tank.
CAREFULLY SOLVE. A spring-loaded piston/cylinder assembly contains 1 kg of R-410a as saturated vapour at -20 ℃. Initially, the spring is relaxed (P1=P0) and if the piston hits the stops, the volume doubles. Heat is added to the assembly until a final condition of 800 kPa, 80 ℃ is reached. Find: a) the work done by the process. b) the heat transfer during the process.
3.134 One kilogram of air in a piston-cylinder assembly undergoes two processes in scries fron an initial state where Pi - 0.5 MPa, T - 227 C Process 1-2: Constant-temperatiure cxpanSIon until the vol- ume is twice the initial volume. Process 2-31 Constant-volume beating until the pressiire is again 0.5 MPa Sketch the two processes in encs og a pu diagran. Assum ing ideal gas behavior, det omice (a) the preASure. nt-tate 2 in MPa, (b) the temperatime t state 3. in C ad tor each of the processes (c) the work d heattranster.each q kl Page
How much energy (in Joules) is required to fully melt 20g of ice taken from the freezer at - 5 degree C (negative 5 C), put on a stove and gently heated until fully molten?
Question: 2 kg mass of ammonia initially at P1=7 bars and T1=180 centigrade undergo a constant pressure process to a final state where quality is 85% determine the work for the process kilojoule Note: please do it clear and step wisely thanks in advanced........
Q/ when a mixture of liquid and vapor exists the ratio of the mass of the liquid and vapor mixture is called ..?
2.0 lb of water inside a piston-cy inder assembly undergoes the following two processes in series Process 1-2: Contant pressure cooling from a saturated vapor at p1 = 170 psi until x2 = 80%. Process 2-3: Constant volume heating to a saturated vapor. There are no changes in kinetic or potential energy. a) Find the specific volume for state 1 in ft3/lb. b) Find the specific volume at state 2 in Ft3/lb
A piston cylinder arrangement initially contains 7.0 kg of super-heated steam at 100 kPa and 250 oC, now heat is removed until 0.56 condenses. 1) What is the amount of heat removed in (kJ)? 2) What is the final volume (m3)?
Q2: For Fig (1): A. Calculate specific enthalpy, specific internal energy. temperature and specific volume for points a-g. B. Draw the figure in PI diagram and locate the position of the points a - g. C. Draw the figure in TV position of the points a - g. diagram and locate the Р 400 Kpa a by 0.3 m³ Fig (1)