A 3 Kg mass of water is heated to a temperature of 99.5 C at 1 bar of pressure.   It is slowly poured into a heavily insulated beaker containing 7.5 Kg of water at a temperature and pressure of 4 C, 1 bar, respectively.  The specific heat of the water, an incompressible material is, c = 4.1 KJ/(Kg K).  The beakers are an adiabatic system.  The two water mass’ reach an equilibrium temperature.  There is no kinetic or potential energy change in this problem. Using the first law determine the final temperature of the water in the beaker. Calculate the entropy production in this process. (Hint: note that this is an incompressible material which means that the density and specific volume are constant)

Question

A 3 Kg mass of water is heated to a temperature of 99.5 C at 1 bar of pressure.   It is slowly poured into a heavily insulated beaker containing 7.5 Kg of water at a temperature and pressure of 4 C, 1 bar, respectively.  The specific heat of the water, an incompressible material is, c = 4.1 KJ/(Kg K).  The beakers are an adiabatic system.  The two water mass’ reach an equilibrium temperature.  There is no kinetic or potential energy change in this problem.

  1. Using the first law determine the final temperature of the water in the beaker.
  2. Calculate the entropy production in this process. (Hint: note that this is an incompressible material which means that the density and specific volume are constant)

 

Expert Answer

Want to see the step-by-step answer?

Check out a sample Q&A here.

Want to see this answer and more?

Experts are waiting 24/7 to provide step-by-step solutions in as fast as 30 minutes!*

*Response times vary by subject and question complexity. Median response time is 34 minutes and may be longer for new subjects.

Related Mechanical Engineering Q&A

Find answers to questions asked by students like you.

Q: Water is entering a tank with diameter dt with a constant mass flow rate of ˙m. The tank has an open...

A: The velocity ate the outlet is given as the:

Q: An FCC iron-carbon alloy initially containing 0.10 wt% C is carburized at an elevated temperature an...

A: We can find the  diffusion co-efficient for FCC iron alloy as follows:

Q: True or False: The BREAK command converts rays into Xlines.

A: Break command:  Break command is used to break an object into two separate parts or used for removin...

Q: Find a and b so that the ordered data set has a mean of 24 and a median of 38.15, 32, 25, 28, 37, a,...

A: The mean of given data set (also, referred as the average) of given numerical values is calculated i...

Q: The question is: Calculate the velocity of sound propagating in water at 20 degrees C. Assume that t...

A: The expression to find the velocity of sound in water is:

Q: What formula do I use? A cylinder of diameter 122 mm and length of 200mm is placed inside a concentr...

A: Write the expression for the specific gravity:

Q: Refrigerant 134a enters the condenser of a residential heat pump at 900 kPa and 40 degrees C at a ra...

A: Assumption:Pump operate in steady stateKinetic and potential energies are neglected. Solution:Draw t...

Q: A spring-loaded piston–cylinder device contains a mixture of gases whose pressure fractions are 25 p...

A: Given Information:Pressure fraction of Neon fNe=0.25Pressure fraction of Oxygen fO2=0.50Pressure fra...

Q: A cube 80 mm per side is made of a rigid foam material and floats in water with 60 mm of the cube be...

A: Click to see the answer