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
Naily [24]
3 years ago
9

A rigid tank contains an ideal gas at 40°C that is being stirred by a paddle wheel. The paddle wheel does 240 kJ of work on the

ideal gas. It is observed that the temperature of the ideal gas remains constant during this process as a result of heat transfer between the system and the surroundings at 30°C. Determine the entropy change of the ideal gas.
Engineering
1 answer:
Sergeu [11.5K]3 years ago
8 0

To solve the problem it is necessary to consider the concepts and formulas related to the change of ideal gas entropy.

By definition the entropy change would be defined as

\Delta S = C_p ln(\frac{T_2}{T_1})-Rln(\frac{P_2}{P_1})

Using the Boyle equation we have

\Delta S = C_p ln(\frac{T_2}{T_1})-Rln(\frac{v_1T_2}{v_2T_1})

Where,

C_p = Specific heat at constant pressure

T_1= Initial temperature of gas

T_2= Final temprature of gas

R = Universal gas constant

v_1= Initial specific Volume of gas

v_2= Final specific volume of gas

According to the statement, it is an isothermal process and the tank is therefore rigid

T_1 = T_2, v_2=v_1

The equation would turn out as

\Delta S = C_p ln1-ln1

<em>Therefore the entropy change of the ideal gas is 0</em>

Into the surroundings we have that

\Delta S = \frac{Q}{T}

Where,

Q = Heat Exchange

T = Temperature in the surrounding

Replacing with our values we have that

\Delta S = \frac{230kJ}{(30+273)K}

\Delta S = 0.76 kJ/K

<em>Therefore the increase of entropy into the surroundings is 0.76kJ/K</em>

You might be interested in
If a worker currently makes $425.00 per week, what Is the gross amount they’ll earn if they work every week of the year
olga nikolaevna [1]

Answer:

we know that

A worker currently makes \$425.00 per week

remember that

1\ year=52\ weeks

so

by proportion find the amount that the worker will earn in one year

\frac{425}{1} \frac{\$}{week} =\frac{x}{52} \frac{\$}{weeks} \\ \\x=52*425 \\ \\x=\$22,100

therefore

the answer is

\$22,100

Explanation:

4 0
3 years ago
50 points what shape is mars
Artyom0805 [142]
A sphere.............
5 0
2 years ago
Read 2 more answers
Copper is generally considered easy to weld because of its high thermal conductivity: (a) true or (b) false?
inn [45]

Answer:

b)False

Explanation:

Those material have high thermal it is very difficult to weld because due to high thermal conductivity it transmit the heat in to the surrounding and can not reach a particular temperature required to melt the material.And when material does not melt then there is no possibility to weld the material.

So from above we can say that it is very difficult to weld the copper material due to high thermal conductivity.Generally welding of copper done by usiong gas welding technique.

So our option b is right.

8 0
3 years ago
What is the thermal energy contained within a cubic kilometre of granite (in barrels of oil equivalent) for every one degree cha
AnnZ [28]

Answer:

348643.34 barrels of oil

Explanation:

Given;

Volume of the granite = 1 km³ = 1000³ m³

Specific heat of granite, C = 790 J/kg.°C

Density of granite = 2700 kg/m³

Energy in 1 barrel of oil = 6.118 × 10⁹ J

For every 1° change in temperature, ΔT = 1°C

Now,

The thermal energy stored is given as;

Thermal energy = mCΔT

where, m is the mass

the mass of 1 km³ of granite = Density × Volume

or

the mass of 1 km³ of granite = 2700 × 1000³ = 27 × 10¹¹ Kg

therefore,

Thermal energy = 27 × 10¹¹ × 790 × 1

or

Thermal energy = 21330 × 10¹¹ J

hence,

the thermal energy in terms of barrels of oil

= Total thermal energy / Energy stored in 1 barrel of oil

= 21330 × 10¹¹ J / ( 6.118 × 10⁹ J per barrel )

= 348643.34 barrels of oil

4 0
3 years ago
Trevor typically works on the highways doing maintenance. Who is most likely his employer? a large private company himself the g
Naddika [18.5K]

Answer: The Government.

Explanation: Highways are usually a roads where people travel on. They are usually owned mainly by the government some are owned by private entities. Of the above options the most possible employer of Trevor is the government as majority of the highways are usually owned by the government.

The government provide several services on the highways such as roads maintenance, security, accidents and emergency cares etc

3 0
3 years ago
Read 2 more answers
Other questions:
  • A large prime number isP = 232582657 - 1
    8·1 answer
  • What is the definition of a duty cycle?
    9·1 answer
  • A heat recovery device involves transferring energy from the hot flue gases passing through an annular region to pressurized wat
    6·1 answer
  • Given: A graphite-moderated nuclear reactor. Heat is generated uniformly in uranium rods of 0.05m diameter at the rate of 7.5 x
    9·1 answer
  • Identify one of the advantages of 3d modeling?
    6·1 answer
  • Investigating how slime molds reproduce is an example of applied research.<br> True<br> False
    11·1 answer
  • Mention verious medium level and higher level human resources related to engineering​
    6·1 answer
  • When block C is in position xC = 0.8 m, its speed is 1.5 m/s to the right. Find the velocity of block A at this instant. Note th
    14·1 answer
  • What are the horizontal structures beneath a slab that help transfer the load from the slab to the columns?
    14·2 answers
  • (i) what assumptions about the relationship between the inputs and output are inherent in this specification? do scatter plots s
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!