Physics, 05.08.2019 01:00 malikbryant2002

Asystem absorbs 12 j of heat from the surroundings; meanwhile, 28 j of work is done by the system. what is the change of the internal energy δeth of the system? '

Answers: 1

Show answers

Answers

Answer from: melikefood01

The change in the internal energy of the system after absorbing the energy is $\boxed{40\,{\text{J}}}$ .

Further Explanation:

Given:

The energy absorbed by the system from the surroundings is $12\,{\text{J}}$ .

The work done by the surroundings on the system is $28\,{\text{J}}$ .

Concept:

Since there is some amount of the work done on the system and the system also absorbs some amount of energy from the surroundings, the change in internal energy of the system is given by the First Law of Thermodynamics.

The First Law of Thermodynamics state that the total energy of an isolated system is always conserved. It means that the change in the internal energy of the system is equal to the sum of the amount of energy absorbed by the system and the amount of work done by the surroundings on the system.

$\Delta U=Q+W$

Here, $\Delta U$ is the change in internal energy of the system, is the energy absorbed by the system and is the work done on the system.

Substitute the value of the energy absorbed and the work done in above expression.

$\begin{aligned}\Delta U&=12\,{\text{J}}+28\,{\text{J}}\\&={\text{40}}\,{\text{J}}\\\end{aligned}$

Thus, the change in the internal energy of the system is $\boxed{40\,{\text{J}}}$ .

Learn More:

1. One consequence of the third law of thermodynamics is that

2. According to Charles’s law, for a fixed quantity of gas at constant pressure

3. Calculate the average translational kinetic energy (sometimes just called average kinetic energy)

Answer Details:

Grade: College

Subject: Physics

Chapter: Heat and Thermodynamics

Keywords:

System absorbs, heat from surroundings, work done, energy absorbed, change in internal energy, first law of thermodynamics,

Answer from: Quest

answer: the rock sample is a sedimentary rock.

explanation:

it is given that:

mass of rock sample, m = 2.7 g

volume of rock sample, $v = 1.1 cm^{3}$

so, density of rock sample will be

$density = \frac{mass}{volume}$

$\rho =\frac{2.7}{1.1}g/cm^{3}\\\\\rho =2.45 g/cm^{3}$

since, the density of rock sample is $2.45 g/cm^{3}$ . hence, the rock sample is a sedimentary rock, whose densities varies between $2g/cm^{3} - 2.6 g/cm^{3}$ .

Answer from: Quest

It won't lose or gain electrons if it's a covalent bond it shares the electrons with another atom or atoms. if it is an ionic bond it will lose the 3 electrons on the outer shell and become a positively charged ion. credit goes to @sunshinebaby of answers.yahoo.com.

Another question on Physics

Physics, 22.06.2019 04:30

Light that is polarized along the vertical direction is incident on a sheet of polarizing material. only 96% of the intensity of the light passes through the sheet and strikes a second sheet of polarizing material. no light passes through the second sheet. what angle does the transmission axis of the second sheet make with the vertical?

Answers: 2

Answer

Physics, 22.06.2019 15:10

An important dimensionless parameter concerned with very high-speed flow is the mach number, defined as v/c, where v is the speed of the object such as an airplane or projectile, and c is the speed of sound in the fluid surrounding the object. for a projectile traveling at 1170 mph through air at 50 ˚f and standard atmospheric pressure, what is the value of the mach number?

Answers: 2

Answer

Physics, 22.06.2019 15:40

Apotter's wheel moves uniformly from rest to an angular speed of 0.20 rev/s in 32.0 s. (a) find its angular acceleration in radians per second per second. rad/s2 (b) would doubling the angular acceleration during the given period have doubled final angular speed?

Answers: 1

Answer

Physics, 22.06.2019 23:30

Macy always thought there were only a few hair colors blonde brown and black however when she actually began looking around she saw varying shades of these hair color what is a possible reason for so many different hair colors

Answers: 1

Answer

You know the right answer?

Asystem absorbs 12 j of heat from the surroundings; meanwhile, 28 j of work is done by the system....

Questions

Engineering, 25.02.2021 18:40

Consider a single crystal of silver oriented such that a tensile stress is applied along a [001] direction. If slip occurs on a (111) plane and in a l...