Physics, 28.02.2020 00:53 madisyn13

A heat engine operates between a hih temp reservoir at 610K and low temp reservoir at 320K. In one cycle, the engine absorbs 6400J from the high temp reservoir and does 2200 J of work. What is the net change in entropy as a result of this cycle?

Answers: 1

Show answers

Answers

To solve this problem it is necessary to apply the concepts related to entropy. Entropy can be defined as the change between heat energy and body temperature. For this case we will analyze the entropy in the cold body and later in the hot body. From there we will find the entropy difference

Entropy can be defined as,

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

Here,

Q = Heat Flow

T = Temperature

The entropy of the hot reservoir goes down by

$S_1 = \frac{6400J}{610K}$

The entropy of the "cool" reservoir increases by

$S_2 = \frac{4200J}{320K}$

$\Delta S = S_2 -S_1$

$\Delta S = \frac{4200J}{320K}-\frac{6400J}{610K}$

$\Delta S = 13.125-10.492$

$\Delta S = 2.633J/K$

As expected, entropy increased in this process; the entropy lost by the hot side was less than the entropy gained by the cool side.

Answer from: franvelpaulino2191

the net change in entropy as a result of this cycle is 2.63 J/K

Explanation:

given information:

high temperature, $T_{H}$ = 610 K

low temperature, $T_{C}$ = 320 K

heat absorbed, $Q_{H}$ = 6400 J

work, W = 2200 J

to calculate the net change in entropy as a result of this cycle, we can use the following formula:

ΔS = $\frac{Q_{H} }{T_{H} } +\frac{Q_{C} }{T_{C} }$ and W = $Q_{H}$ - $Q_{C}$

where

ΔS = the change of entropy

$T_{H}$ = the high temperature

$T_{C}$ = low temperature

$Q_{H}$ = absorbed heat

$Q_{C}$ = released heat

first, we determine the $Q_{C}$

W = $Q_{H}$ - $Q_{C}$

$Q_{C}$ = 6400 - 2200

= 4200 J

therefore,

ΔS = $\frac{Q_{H} }{T_{H} } +\frac{Q_{C} }{T_{C} }$

= $-\frac{6400}{610} + \frac{4200}{320}$

= - 10.49 + 13.125

= 2.63 J/K

Answer from: Quest

quantum mechanics or quantum physics is physics of very small objects (particles) and physical entities.

quantum physics has some parallels to our macro world and some pretty unique ideas which theoretically and mathematically proven to be true even though we will never be able to access them because of our size.

there are many types of particles: subatomic, elementary etc.

subatomic means they are smaller than atom, elementary means they are at the very basis of everything.

subatomic particles are for eg. protons, neutrons but not electrons.

elementary particles are categorised into 3 groups by what they do.

these 3 groups are quarks, leptons and bosons.

light for example is a particle more precisely a photon a part of leptons.

proton (subatomic particle) is made out of 2 up quarks and 1 down quark each of these has a fractional charge like $\frac{1}{3}$ . (i crazy)

most famous scientist who contributed to this physics are:

max planckalbert einsteinerwin schrödingermany

the topic itself us understand a lot and will probably be vastly used in the future (quantum computers, understanding the big bang,

we also must not forget quantum effects like:

superposition (where 1 thing can be this and that at the same time),entanglement (where two particles are seemingly connected by some sort of unknown (or known) force, energy, matter (i know all that can be the same at least it was at the beginning)

and there is more. but probably too much for this answer to be consistent due to my average understanding of this topic.

hope this you understand quantum mechanics a little more. i'm not an expert in the topic (so don't be like wth if you are an expert) but i'm very interested in it.

anyways quantum physics is a very hard topic (harder than physics (perhaps)) therefore searching for every information there is about it and learning it is unfortunately impossible (you can only specialise into 1 - 3 things or more (perhaps

have fun and i wish you luck!

r3t40

Answer from: Quest

Where are the options ?

Another question on Physics

Physics, 22.06.2019 02:00

Figure 9 on page 362 shows various motions of balls. the curved path followed by the yellow ball in b in picture b is result of a) inertia b) centripetal motion c) gravity and horizontal velocity d) linear motion

Answers: 3

Answer

Physics, 22.06.2019 07:50

2. -/1 pointsserpse10 2.7.p.017.mi. an object moving with uniform acceleration has a velocity of 14.0 cm/s in the positive x direction when its x coordinate is 2.97 cm. if its x coordinate 2.85 s later is -5.00 cm, what is its acceleration? cm/s2 need ? read it master it

Answers: 1

Answer

Physics, 22.06.2019 11:30

If we relied solely on the nonrenewable resources found in the u.s., which one would we run out of first at current usage levels? a. natural gas b. oil c. uranium d. coal

Answers: 1

Answer

Physics, 22.06.2019 12:00

In a set amount of time, a battery supplies 25j of energy to an electric circuit that includes two different loads. one of the loads produces 10 j of heat energy during this time interval. how much heat energy is produced by the second load in this time? explain your answer

Answers: 3

Answer

You know the right answer?

A heat engine operates between a hih temp reservoir at 610K and low temp reservoir at 320K. In one c...

Questions