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
Alchen [17]
3 years ago
5

A 34.1-mL sample of benzene at 20.8°C was cooled to its melting point, 5.5 °C, and then frozen at 5.5 °C. Calculate the quantity

of energy transferred to the surroundings in this process. The density of benzene is 0.876 g/mL. The specific heat capacity of the liquid is 1.74 J g-1 K-1. Its fusion enthalpy is 127 J/g. J
Physics
2 answers:
Nataly_w [17]3 years ago
7 0

Answer:

4541.8 J or 4.542 KJ

Explanation:

From our knowledge of density of a substance,  density=mass/volume

∴ mass=density×volume ⇒0.876×34.1=29.565 g

The quantity of heat transferred to the surrounding ∈ΔH=mcΔT+ML

=29.565×1.74(20.8-5.5)+(29.565× 127) = 4541.8 J or 4.542 KJ

posledela3 years ago
3 0

Answer:

4541.8 J

Explanation:

First we find the mass of benzene available

mass = density x volume

         = 0.867 x 34.1

         = 29.5647 g

Then we find the amount of heat transferred by two processes:

heat tranferred = heat lost during temp drop + heat lost during freezing

                         = mcΔT + mL

                         = 29.5647 x 1.74 x (20.8 - 5.5) + 29.5647 x 127

                         = 4541.7883434 J

                         = 4541.8 J

                         

You might be interested in
Types of mechanical waves include
USPshnik [31]
I think surface waves
4 0
3 years ago
How can you describe the motion of an object in a race?
Hitman42 [59]
You can describe the motion of an object by its position, speed, direction, and acceleration
4 0
2 years ago
Plz help with these 4
Airida [17]

Answer:

1) The human skeleton performs six major functions: support, movement, protection, production of blood cells, storage of minerals, and endocrine regulation. protection of internal organs

2) Joints are where two bones meet. They make the skeleton flexible — without them, movement would be impossible. Joints allow our bodies to move in many ways.

3)A joint is a point where two or more bones meet. There are three main types of joints; Fibrous (immovable), Cartilaginous (partially moveable) and the Synovial (freely moveable) joint

4)A ligament is a fibrous connective tissue which attaches bone to bone, and usually serves to hold structures together and keep them stable.

Explanation:

go-gle your welcome ;)

5 0
3 years ago
Read 2 more answers
A bowling ball of mass m = 1.7 kg drops from a height h = 14.2 m. A semi-circular tube of radius r = 6.2 m rest centered on a sc
marshall27 [118]

Answer:

W_net = mg + 2mgh/r

Explanation:

The forces applied in this motion of the bowling ball are both gravitational and centripetal forces.

Now, gravitational force is; F_g = mg

While centripetal force is; F_c = mv²/r

Since we want to express the net force in terms of the variables in the statement and we are not given "v", let's find an expression of v with the variables given.

Now, from Newton's equation of motion, at initial velocity of 0, v² = 2gh.

Thus;

F_c = 2mgh/r

Where;

m is ball mass

r is tube radius

h is fall height

Thus, the net force will be;

F_net = F_g + F_c

Now, Net force would be equal to the net weight that will be read on the scale.

Thus;

W_net = F_net = F_g + F_c

W_net = mg + 2mgh/r

8 0
3 years ago
Frost wedging happens when _____.
KiRa [710]

Answer: water freezes inside a rock, causing it to break

Weathering is a natural process in which the rocks break into pieces or sediments by the action of wind, water and chemical agents. Frost wedging is a physical weathering process. It occurs in an area where temperature fluctuations occurs due to change in the climatic conditions. This occurs due to rapid heating and cooling. The rocks lying in a cold environment, the water residing in the rocks gets freezed. The water in ice form that is solid form acquire more space than in liquid form, therefore, the developed ice will affect the physical structure of the rock. The formation of ice results in the development of break or crack in the rock typically in the shape of a wedge and thus the phenomena is called as frost wedging.

Hence, frost wedging happens when water freezes inside a rock, causing it to break.

8 0
3 years ago
Other questions:
  • Explain ways that weak and strong nuclear forces are alike.
    13·1 answer
  • How do I do these? My teacher didn’t show us how.
    11·1 answer
  • A scientist finds a new life form. The life form is 2 meters tall. It makes its own food. It has tubes that carry food and water
    7·1 answer
  • In aircraft design, the pressure coefficient Cp is usually measured during wind tunnel testing of an aircraft component to predi
    9·1 answer
  • At the same instant that a 0.50-kg ball is dropped from 25m above Earth,? At the same instant that a 0.50-kg ball is dropped fro
    15·1 answer
  • Name four factors that affect local, regional climates?
    5·2 answers
  • Why would the discovery of a fossil imply that earth is much older than originally though ?
    9·1 answer
  • A light bulb is supplied with 100 J of energy each
    12·1 answer
  • Hi, can you please help me?
    8·1 answer
  • What device increases voltage?
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!