1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Klio2033 [76]
3 years ago
6

An insulated rigid tank contains 3 kg of H2O in the form of a saturated mixture of liquid and vapor at a pressure of 150 kPa and

a quality of 0.25. An electric heater inside the tank is turned on to heat this H2O until the pressure increases to 200 kPa. Please determine the change in total entropy of water during this process. Hint: See if you can find the electrical work consumed during this process.
Physics
1 answer:
Andre45 [30]3 years ago
8 0

Answer:

change in entropy is 1.44 kJ/ K

Explanation:

from steam tables

At 150 kPa

specific volume

Vf = 0.001053 m^3/kg

vg = 1.1594 m^3/kg

specific entropy values are

Sf = 1.4337 kJ/kg K

Sfg = 5.789 kJ/kg

initial specific volume is calculated as

v_1 = vf + x(vg - vf)

      = 0.001053 + 0.25(1.1594 - 0.001053)

v_1 = 0.20964  m^3/kg

s_1 = Sf + x(Sfg)

     = 1.4337 + 0.25 \times 5.7894 = 2.88 kJ/kg K

FROM STEAM Table

at 200 kPa

specific volume

Vf = 0.001061 m^3/kg

vg = 0.88578 m^3/kg

specific entropy values are

Sf = 1.5302 kJ/kg K

Sfg = 5.5698 kJ/kg

constant volume  sov_1 -  v_2  = 0.29064 m^3/kg

v_2 = v_1 = vf + x(vg - vf)

       =0.29064 = x_2(0.88578 - 0.001061)

x_2 = 0.327

s_2 = 1.5302 + 0.32 \times 5.5968 = 3.36035 kJ/kg K

Change in entropy \Delta s = m(s_2 - s_1)

              =3( 3.36035 - 2.88) =  1.44 kJ/kg

You might be interested in
In SI units, what is the magnitude the net force acting on a 1,152 kg car that accelerates uniformly along a straight line from
geniusboy [140]

Answer:

Fnet = 14515.2 Newton

Explanation:

Net force can be defined as the vector sum of all the forces acting on a body or an object i.e the sum of all forces acting simultaneously on a body or an object.

Mathematically, net force is given by the formula;

Fnet = Fapp + Fg

Where;

  • Fnet is the net force.
  • Fapp is the applied force.
  • Fg is the force due to gravitation.

Given the following data;

Mass = 1,152 kg

Initial velocity, u = 3m/s

Final velocity, v = 17m/s

Time, t = 5 seconds

To find the magnitude of the net force;

First of all, we would determine the acceleration of the car.

Acceleration = (v-u)/t

Acceleration = (17 - 3)/5

Acceleration = 14/5

Acceleration = 2.8m/s

To find the applied force;

Fapp = mass * acceleration

Fapp = 1,152 * 2.8

Fapp = 3225.6 N

Next, we would find the force exerted on the car due to gravity.

Fg = mass * acceleration due to gravity

We know that acceleration due to gravity is equal to 9.8m/s²

Fg = 1152 * 9.8

Fg = 11289.6N

Substituting the values into the equation, we have;

Fnet = 3225.6 + 11289.6

Fnet = 14515.2 Newton

7 0
3 years ago
Which two vectors when added will have the largest positive x component?
luda_lava [24]

Answer:

<em>The Number is concept. It is depending with what you mean by infinity. Some of the numbers include 1 through 2 or infinite. If you work with vector space of tuples with any components could be infinite you just know what typed of infinity work with.</em>

Explanation:

<em>May you have a bless day. And send positive all over the world.</em>

4 0
3 years ago
The speed of the wooden bar is changed so that the bar hits the water fewer times each second.
Hitman42 [59]

Answer:

c - the frequency of the waves decreases

3 0
2 years ago
Both a fire blanket and the spray from a fire extinguisher put out a fire by pressing down on the fire and pushing any oxygen aw
Sladkaya [172]

Answer:

Water can carry electricity

Explanation:

While pure water does not conduct electricity, ionized water does. It is common that water is ionized than is pure, unless it is purified. The dissolved ions in the water are what makes the water conduct electricity. Handling electric equipment with wet hands may lead to electrocution.

7 0
3 years ago
Read 2 more answers
Click to review the online content. Then answer the question(s) below, using complete sentences. Scroll down to view additional
vivado [14]

The facial feedback theory is a psychological theory associated with the emotional consequences due to physiological actions.

The provided case study a number of smiling faces which made the person saying it smile thereby working there muscles that related with smile this makes a psychological consequence and people find  things much  more funnier than they usually are.

If as a viewer again this case study is provided and the viewers is allowed to mimic in mirror he or she will again make much  funnier faces due to the psychological consequence.

6 0
2 years ago
Other questions:
  • A piece of plastic is uniformly charged with surface charge density n1.
    14·1 answer
  • The mere exposure effect is
    12·1 answer
  • One plane departed from New York, and at the same time another plane departed from Mexico City. They flew toward each other at r
    11·2 answers
  • As an object falls freely near the surface of the earth, its velocity?
    11·1 answer
  • A diagram of a closed circuit with power source on the left labeled 12 V, a resistor on the top labeled 10 Ohms, a resistor on t
    9·2 answers
  • a solution made by dissolving 116 g of CaCl2 in 64 g of water has a density of 1.180 g/ml at 20 degrees celsius what is the mola
    6·1 answer
  • A ball is thrown horizontally from the top of a 60.0m and lands 100.0m from the base of the building ignore air resistance.(a) h
    10·1 answer
  • Please help me and get 15 points and Brainlessly!!!!!!!
    13·1 answer
  • A 1500 kg car traveling due east at 20<br> m/s slows to a stop in 5.0 seconds. What is the impulse?
    12·2 answers
  • Help pleasessssssssssssss
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!