A closed system of mass 20 kg undergoes a process in which there is a heat transfer of 1000 Q6: ki from the system to the surroundings. The work done on the system is 200 kl. If the initial 5 specific internal energy of the system is (250+R:) kl/kg, what is the final specific internal energy, in kj/kg? Neglect changes in kinetic and potential energy:

Answers

Answer 1

The final specific internal energy : 190 kJ/kg

Further explanation  

The laws of thermodynamics 1 state that: energy can be changed but cannot be destroyed or created  

The equation is:  

[tex]\tt E_{in}-E_{out}=\Delta E~system\\\\\Delta E=\Delta U+\Delta KE+\Delta PE\\\\\Delta U=m(U_2-U_1)\\\\Q-W=\Delta U+\Delta KE+\Delta PE[/tex]  

 

Energy owned by the system is expressed as internal energy (U)  

This internal energy can change if it absorbs heat Q (U> 0), or releases heat (U <0). Or the internal energy can change if the system does work or accepts work (W)  

The sign rules for heat and work are set as follows:  

• The system receives heat, Q +  

• The system releases heat, Q -  

• The system does work, W -  

• the system accepts work, W +  

A closed system of mass 20 kg⇒m=20 kg

Heat transfer of 1000 kJ from the system to the surroundings⇒Q=-1000 kJ

The work done on the system is 200 kJ⇒W=+200 kJ

The initial specific internal energy of the system is 250 kJ /kg⇒U₁ = 250 kj/kg

Neglect changes in kinetic and potential energy⇒ΔKE+ΔPE=0, so

Q-W = ΔU

Input in equation

[tex]\tt -1000-200=20(U_2-250)\\\\-1200=20U_2-5000\\\\3800=20U_2\\\\U_2=190~kJ/kg[/tex]


Related Questions

Use the Intermediate Value Theorem to show that there is a root of the given equation in the specified interval. Ex = 6 − 5x, (0, 1) The equation ex = 6 − 5x is equivalent to the equation f(x) = ex − 6 + 5x = 0. F(x) is continuous on the interval [0

Answers

Answer:

some part of your question is incomplete

attached below is the complete question

Answer :

F(0) = -5  < 0

F(1) = e - 1 > 0

since the functions : f(0) and f(1) have opposite signs then there is a 'c' whereby F(c) = 0 ( intermediate value theorem fulfilled )

Hence there is a root in the given equation : [tex]e^x = 6 - 5x[/tex]

Explanation:

using Intermediate value Theorem

If F(x) is continuous and f(a) and f(b) have opposite signs then there will be a'c'E (a,b)  whereby F(c) = 0

given equation : [tex]e^x = 6 - 5x[/tex]   on (0,1)

and F(x) = [tex]e^x - 6 + 5x = 0[/tex]

This shows that the F(x) is continuous on (0,1)

F(0) = [tex]e^0 - 6 + 5(0)[/tex]  = -5 which is < 0

F(1) = [tex]e^1 -6 + 5(1)[/tex] = e -1 > 0  and e = 2.7182

since the functions : f(0) and f(1) have opposite signs then there is a 'c' whereby F(c) = 0 ( intermediate value theorem fulfilled )

Hence there is a root in the given equation : [tex]e^x = 6 - 5x[/tex]


Help!!
Which of the following describes the first and foremost guideline in dimensioning?
A. Legibility
B. Measurement
C. Accuracy
D. Sketching

Answers

Answer:

it should be accuracy

Explanation:

Answer:

option C

Explanation:

(a) At a simple interest rate of 12% per year, determine how long it will take $5000 to increase to twice as much. (b) Compare the time it will take to double if the rate is 20% per year simple interest.

Answers

Explanation:

10000=5000(1.12^x)

2=1.12^x

(log_1.12)(2)=x

x= about 6.1163

10000=5000(1.2^x)

2=1.2^x

(log_1.2)(2)=x

x= about 3.8019

compare them by saying like 20% will be 6.12/3.8 times faster

in a vehicle you're servicing the fuel pressure drops rapidly when the engine is says that one or more turned off. Technician a says that one or more could be leaking technician b says that a defective check valve in the fuel pump could be the cause who is correct

Answers

Answer:

Both Technicians A and B  are correct

Explanation:

If the fluid pressure will decrease quickly in a car when the ignition says that one or more has been switched off. One or two could be leaking or the source could be a faulty check mechanism in the catalytic converter.

An engineer is trying to build a new measurement tool. Which step should the engineer complete first? A. Design a model of the tool to be tested. B. Precisely define the problem that is to be solved. Selected:c. Write a list of the criteria and constraints for the tool.This answer is incorrect. D. Conduct research on how similar problems were solved in the past.

Answers

Answer:

B. Precisely define the problem that is to be solved.

Explanation:

Engineering can be defined as the scientific and technological principles that is used for the design, development, operation and control of tools, machines or equipments, structures and systems. These machines, tools, systems and structures are typically designed and developed for the purpose of solving peculiar problems relating to human life. Simply stated, engineering is focused on proffering solutions to real life problems through a design process.

Generally, the design process comprises of series of steps used for the development of various tools, machines, structures and systems. In a chronological order, the basic steps of a design process are;

1. Define the problem: to proffer a solution to any problem, you have to precisely define the problem that is to be solved. Therefore, this is the first step of the design process.

2. Conduct a research: the engineer should collect or gather data (informations) relating to the project.

3. Brainstorming and analysis of data: this is the stage where the engineer conceptualize his or her ideas.

4. Create a prototype or simulated model of the product.

5. Product analytics and test: this is where the product is being used and tested for any flaw, error or defects. Thus, troubleshooting is also required at this stage.

Hence, if an engineer is trying to build a new measurement tool; the first step the engineer should complete is to precisely define the problem that is to be solved so as to have a good clear-cut understanding of the problem.

What motivated software engineers to move from the waterfall model to the incremental or spiral model

Answers

Answer:

1. They needed to develop multiple components in software programs.

2. The ability to overlap the development to be more evolutionary in nature.

3. The need to be more risk-averse or the unwillingness to take risks led to the use of a spiral model.

Explanation:

Software development life cycle (SDLC) can be defined as a strategic process or methodology that defines the key steps or stages for creating and implementing high quality software applications.

In SDLC, a waterfall model can be defined as a process which involves sequentially breaking the software development into linear phases. Thus, the development phase takes a downward flow like a waterfall and as such each phase must be completed before starting another without any overlap in the process.

An incremental model refers to the process in which the requirements or criteria of the software development is divided into many standalone modules until the program is completed.

Also, a spiral model can be defined as an evolutionary SDLC that is risk-driven in nature and typically comprises of both an iterative and a waterfall model. Spiral model of SDLC consist of these phases; planning, risk analysis, engineering and evaluation.

What motivated software engineers to move from the waterfall model to the incremental or spiral model is actually due to the following fact;

They needed to develop multiple components in software programs. The ability to overlap the development to be more evolutionary in nature. The need to be more risk-averse or the unwillingness to take risks led to the use of a spiral model.

Help please all of the numbers b4 the equal sign are wrong

Answers

Answer:

3/5" = 12'1 3/4" = 35'1 1/4" = 25'9/10" = 18'2 13/20" = 53'

Explanation:

One number is wrong; they all lack units.

The basic ratio is 1" = 20', so you can divide feet by 20 to find inches.

3/5" = 12'1 3/4" = 35'1 1/4" = 25'9/10" = 18'2 13/20" = 53'

Perhaps you want decimal inches:

0.60" = 12'1.75" = 35'1.25" = 25'0.90" = 18'2.65" = 53'

Don't break or crush mercury-containing lamps because mercury powder may be released.
A) TrueB) False

Answers

A.

It would be released without a doubt so be careful!

Hope this helps :)
Other Questions
Monica is rollerblading along a trail in Tropical Park. She stopped for water after rollerblading for 2.45 miles. She continued on the trail for another 3.04 miles, then stopped for lunch. She made her final stop after rollerblading for another 2.8 miles. How many miles did Monica rollerblade? Pls help me ASAP PLS PLS PLS PLS PLS PLS ASAP When was Hitler Youth started and by whom? Quines fueron las personas asesinadas en el levantamiento de 1932? HeLp AsAp!!!!!! How long would it take you to hop 30 meters based on your speed for the 5-meter trial? Show your work!Hopping = Distance-5 mTime-3.41Speed-1.46 An airplane pilot over the Pacific sights a ship wreck at an angle of depression of 5. At this time, the horizontal distance from the airplane to the wreck is 4629 meters. What is the height of the plane to the nearest meter?405 m The fullness of Divine Revelation is? please help meeeeeeeeeeeeee Colonel Miles Quaritch wants Jake to do all of the following except __________ as part of the Avatar Program. Which is a incorrect rounding of 53.864?A) 54B) 53.9C) 53.87D) 50 I WILL BRAINLIST ITS ONLY ONE PROBLEM !!!!!!!!!!!!!!! Write the equation in slope-intercept form of a line that is parallel to y= -8x - 2 and goes through the point (-1, 11) Can someone pls help me make a sentence that explains how they are similar and/or different?These are the articles: It's Saturday night. You've just fallen asleep after spending the day hanging out with friends, watching movies, and enjoying being a typical teenager on the weekend. Suddenly, the beeper on your nightstand goes off. You jump up and get ready because someone needs your help. For a group of teenagers in Alaska, known as the Dragon Slayers, this is nothing unusual. They are from the town of Aniak, located about three hundred fifty miles west of Anchorage. Forget driving there, you can only reach the town by plane! There are around six hundred residents and one medical clinic, but the doctor only visits once a month. This means that if you are visited by a medical or fire "dragon," getting treatment or being rescued might be difficult. In fact, until the Slayers were formed, there was no emergency service in the town after 4 p.m. To address the problem, the fire chief decided to train qualified teenagers as first responders. He believed that because most of them did not have jobs, they had the time required to take on the responsibility.Today, the Dragon Slayers respond to about 450 calls per year. They are available 24 hours a day, seven days a week. The team is made up of 14- to 18-year-old girls and boys. No matter what the emergency, it is important that Dragon Slayers remain calm and have the medical skills to help those who need them. They have over two hundred hours of medical and fire-safety training. All are certified emergency trauma technicians. They must also get passing grades in school and be drug and alcohol free. They are expected to treat everything from minor injuries requiring only first aid, to more serious issues such as heart attacks. They may be called to scenes ranging from small plane crashes to automobile accidents.Their efforts have saved both lives and property. Just ask a former principal at their high school. At first, he didn't like the idea of Slayers being called out of class to respond to emergencies. However, he changed his mind after suffering a diabetic emergency at school and being cared for by the quick-thinking Slayers. Additionally, if it weren't for the actions of Amanda Hoeldt and several of her Dragon Slayer friends, the community hall might have burned to the ground when it caught fire in 2009. Although not allowed to enter the building, she and the other Slayers set up hoses that eventually put out the blaze, saving the structure. After observing the girls respond to an emergency call, state trooper Sgt. Mike Duxbury commented, "They helped each other out. Gave each other encouragement. They worked as a team."Amanda says that the Dragon Slayers also benefit from their participation in the program. She feels that she is prepared to handle nearly any situation that comes her way. Through teaching others in her community life-saving skills, she has become more confident in her leadership abilities. Agnes Nicoli, another Slayer, says of her participation in the program, "Being able to save lives and save property is a wonderful feeling." Most Slayers go to college, and many of them choose careers in the medical field. And, just in case you're wondering what happens when a Slayer graduates, he or she is replaced by a "Lizard Killer." A Lizard Killer is a younger member of the program who is still in training. Upon completion of that training, he or she earns the right to be promoted to Dragon Slayer. Melissa is very good at her Revenue job. Which skills does Melissa most likely have?performing specialized work to support an embassyanalyzing information from discussions or applicationspublic speaking and debatingreviewing and analyzing tax forms! Find the value of x. Given the point (1, 2) and a slope of 4, write the equation in point slope form. Which topics relate directly to the themes developed in Frankenstein? A florist must make 5 identicalbridesmaid bouquets for a wedding. The budget is$160, and each bouquet must have 12 flowers. Rosescost $2.50 each, lilies cost $4 each, and irises cost$2 each. The florist wants twice as many roses as theother two types of flowers combined. fplzz ans my question factorize p^4+4 Who was the most imperialistic president?