Hot water at a flow rate of 0.5 kg/s at 80ºC and cold water at a temperature of 20ºC at a flow rate of 0.9 kg/s are mixed in a continuous flow mixing chamber. What is the enthalpy of the mixture? The pressure is 250 kPa at each point. Heat exchange with the environment will be neglected. a) 243.0 kJ/kg B) 187.2 kJ/kg NS) 182.5 kJ/kg D) 173.6 kJ/kg TO) 255.6 kJ/kg

Hot water at a flow rate of 0.5 kg/s at 80ºC and cold water at a temperature of 20ºC at a flow rate of 0.9 kg/s are mixed in a continuous flow mixing chamber. What is the enthalpy of the mixture? The pressure is 250 kPa at each point. Heat exchange with the environment will be neglected. a) 243.0 kJ/kg B) 187.2 kJ/kg NS) 182.5 kJ/kg D) 173.6 kJ/kg TO) 255.6 kJ/kg

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

13 -

a)	243.0 kJ/kg

B)	187.2 kJ/kg

NS)	182.5 kJ/kg

D)	173.6 kJ/kg

TO)	255.6 kJ/kg

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Step by step

Solved in 2 steps

SEE SOLUTION Check out a sample Q&A here

Similar questions

Thermodynamics: An air conditioning system operates at a pressure of 1 atm. The system has a heating section and an air-conditioning section that provides saturated water vapor at 105 °C.The air enters the heating section at 15 oC and 60 percent relative humidity with a volume flow of 30 m3 / minute and leaves the humidification section at 25 oC and 50 percent relative humidity. a) Find the temperature and relative humidity of the air when leaving the heater section b)Calculate the heat transfer in the heating section [kJ/min] c)Calculate the water flow rate added in the humidification section [ kg/min] NOTE:Please send the solution manually on paper.
34 - Helium enters a continuous flow compressor at 326 K and leaves at 441 K. If the mass flow rate is 1.5 kg/s, which of the following is the required power? (Cp = 5.1926 kJ/kgK) a) 988.7 kW B) 895.7 kW NS) 617.9 kW D) 927.9 kW TO) 836.0 kW
A) Steam enters a turbine at a pressure of 30 bars, temperature of 400 degrees Celsius and exits at a pressure of 1bar. The turbine is isentropic, how much power is produced per unit mass flow rate, w. Their is no change in kinetic or potential energy and no heat transfer. Answer in kJ/kg B) Steam enters a turbine at a pressure of 30 bars, temperature of 400 degrees celsius and exits at a pressure of 1bar. If the turbine is operating at 95% isentropic efficiency, how much power is being produced per unit mass flow rate, w. Their is no change in kinetic or potential energy and no heat transfer. Answer in kJ/kg C) Steam enters a turbine at a pressure of 30 bars, temperature of 400 degrees celsius and exits at a pressure of 1 bar. If the turbine at 95% isentropic efficiency, what is the quality of the steam exiting the turbine? Their is no change in kinetic or potential energy and no heat transfer.
b) A tank shown in Figure-2 below is used to mix methanol and salt. The tank initially contains 1 m³ of methanol. Salt is provided into the tank with a volumetric flow rate of Fsalt= 0.2 m³ s¹. A stream with perfectly mixed methanol and salt leaves the tank with a volumetric flow rate of F = 0.1 m³ s1. As the flow is unsteady, the volume of mixture in the tank, V(t), is a function of time. Fsalt=0.2 m³/s Psalt=2160 kg/m³ V(t) F=0.1 m³/s Figure-2: A mixing tank of methanol and salt. d(V (t)Psalt) dt Salt+methanol The mass balance of salt in the tank is given by, d(V (t) (Psalt +Pmethanol)) dt = Fsalt Psalt - FPsalt where Psalt is the density of salt and equal to 2160 kgm ³. The total mass in the tank is given by, = Fsalt Psalt - FPsalt - FPmethanol where Pmethanol is the density of methanol and equal to 800 kgm-³. When the tank contains V = 0.5m³ of mixture, what is the mass of salt in the tank? Use the explicit Euler finite difference method to discretise the balance equations. (Hint:…
Q1
100 g of water are mixed with 150 g of alcohol (Þ = 790 kg/m3) What is the specific gravity of the resulting mixture, assuming that the two fluids mix completely? a. 0.00041 b. 0.00086 c. 0.41 d. 0.86
For each situation below, briefly explain how you obtained the values and provide the numerical answer. A) What is the internal energy of saturated water vapor at 305 degree Celsius? B) What is the pressure of a system of saturated liquid water with a specific volume of 0.001488 m^3/kg? C) What is the enthalpy of a saturated mixture of water at 423 k with quality of 43%? D)When 1 kg saturated water vapor is condensed to a saturated liquid water at 325 Kpa, what is the change in its volume? E) What is the specific internal energy of liquid water at 280 degree Celsius and 7500 Kpa?
Please answer in clear handwriting. a room is at 20-degree Celsius and have a relative humidity of 50 % and is heated to 50 degrees Celcius with a heater that has a flow rate of 50 m ^3 per minute we have to maintain the relative humidity of 50% DetermineA) Q dot heater in KJ/minB) mass flow rate of water in teaspoon/min.Consider 1 teaspoon as 25mlNote:Solve it properly by mass energy balance Equation
a.) Determine the mass flow rate of the water vapor, in kg/hr.b.) Calculate the volumetric flow rate of the water vapor leaving the plant, in m^3/hr.c.) Calculate the volumetric flow rate of the brine, in m^3/hr.
The water, initially at 300 kPa and 200°C, is closed.It is compressed isentropically to 8 MPa in a system.What is the final temperature of the water?
State the operation principle of pressure-limiting variable vane pump according to the following figure
Waste from a copper plating facility is being discharged into a receiving stream. The waste stream contains 3.5 mg/L copper with a flow of 4.0 x106 L/day. The receiving stream has an upstream flow of 2.6x107 L/day and 0.50 mg/L of copper. Assume complete and instantaneous mixing at the point where the streams meet and that the system is at steady state. a) Draw the stream disgram b) What is the copper concentration in mg/L immediately downstream of the copper plating facility? c) How many kg per day are contributed to the receiving stream by the copper plating facility? d) What percentage of all of the copper mass in the downstream water is contributed by the upstream flow?