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
Tomtit [17]
3 years ago
13

A sample of copper with a mass of 1.80 kg, initially at a temperature of 150.0°C, is in a well-insulated container. Water at a t

emperature of 27.0°C is added to the container, and the entire interior of the container is allowed to come to thermal equilibrium, where it reaches a final temperature of 70.0°C. What mass of water (in kg) was added? Assume any water turned to steam subsequently recondenses.
Physics
1 answer:
user100 [1]3 years ago
7 0

Answer:

the mass of water is 0.3 Kg

Explanation:

since the container is well-insulated, the heat released by the copper is absorbed by the water , therefore:

Q water + Q copper = Q surroundings =0 (insulated)

Q water = - Q copper

since Q = m * c * ( T eq - Ti ) , where m = mass, c = specific heat, T eq = equilibrium temperature and Ti = initial temperature

and denoting w as water and co as copper :

m w * c w * (T eq - Tiw) = - m co * c co * (T eq - Ti co) =  m co * c co * (T co - Ti eq)

m w = m co * c co * (T co - Ti eq) / [ c w * (T eq - Tiw) ]

We take the specific heat of water as c= 1 cal/g °C = 4.186 J/g °C . Also the specific heat of copper can be found in tables → at 25°C c co = 0.385 J/g°C

if we assume that both specific heats do not change during the process (or the change is insignificant)

m w = m co * c co * (T eq - Ti co) / [ c w * (T eq - Tiw) ]

m w= 1.80 kg *  0.385 J/g°C ( 150°C - 70°C) /( 4.186 J/g°C ( 70°C- 27°C))

m w= 0.3 kg

You might be interested in
How to solve number 10
Vinil7 [7]

The 'formulas' to use are just the definitions of 'power' and 'work':

Power = (work done) / (time to do the work)

and  

Work = (force) x (distance) .

Combine these into one. Take the definition of 'Work', and write it in place of 'work' in the definition of power.

Power = (force x distance) / (time)

From the sheet, we know the power, the distance, and the time.  So we can use this one formula to find the force.

Power = (force x distance) / (time)

Multiply each side by (time):  (Power) x (time) = (force) x (distance)

Divide each side by (distance): Force = (power x time) / (distance).

Look how neat, clean, and simple that is !

Force = (13.3 watts) x (3 seconds) / (4 meters)

Force = (13.3 x 3 / 4) (watt-seconds / meter)

Force = 39.9/4 (joules/meter)

<em>Force = 9.975 Newtons</em>

Is that awesome or what !

6 0
2 years ago
The forces that hold different atoms or ions together are
denis23 [38]

Answer:

Chemical bonds

Explanation:

The chemical bonds hold the different type atoms or ions together.

The type of chemical bonds :

1. Ionic bond  ;

 Ions or atoms changes the electron and form ionic bond.Those atoms gains the electron gets negative charge and those atoms donate the electron gets positive charge.

2.Covalent bond :

  In this type of bond atoms share the electrons and form covalent bonds.

3. Metallic bond :

This type of bond are present in the metals.In this atoms are used free electrons to form bonds.

Therefore answer is --

Chemical bonds

 

7 0
3 years ago
According to perception of movement, in order to sense movement, humans need to see an object _____.
lesya692 [45]

Answer: The correct answer for the blank is- a. change its position relative to other objects.

Perception of motion can be described as a phenomenon of inferring the  direction and speed and of objects, which are moving in a visual scene.

An object is said to be in motion if its position is changed with respect to objects that are present in its surrounding.

Thus, in order to sense motion of objects, humans beings are required to see an object change its position with respect to other objects.

8 0
3 years ago
After a neutral object loses 2 electrons, it will have a
Zepler [3.9K]

Answer:

the measured charge will be -2 elementary charges.

Explanation:

8 0
1 year ago
Read 2 more answers
A woman is conquering her fear of heights by going bungee jumping. She has a mass of 90 kg. She falls from the tower for a few s
Serhud [2]

Answer:

Explanation:

weight of woman acting downwards = 90 x 10 = 900 N

force by bungee cord in upward direction = 500 N

net force = 900 - 500 = 400 N in downward direction

acceleration in downward direction

= 400 / 90

= 4.44 m /s²

7 0
3 years ago
Other questions:
  • Buildings are more dense than the surrounding air. This means that they have more _____ per volume than the air and will stay on
    5·1 answer
  • Which of these is the best explanation for why 2 negatively charged balloons if put close repel
    13·1 answer
  • What is the slope of a line that is perpendicular to the x-axis?
    14·1 answer
  • One way to improve food security is to avoid food spoilage. Identify the correct ways that Devon reduced food spoilage in the pa
    15·2 answers
  • Spinning a loop of wire between the poles of a magnet will induce an electric current. What condition would minimize the induced
    6·1 answer
  • you measure or observe two events to occur at the same time one nearby and one further away. Which one did you actually see firs
    5·2 answers
  • The Gulf Stream off the east coast of the United States can flow at a rapid 3.9 m/s to the north. A ship in this current has a c
    10·2 answers
  • Unlike acceleration and velocity, speed is NOT a quantity that accounts for..
    14·2 answers
  • Help please!!! Brainlyist to the person who answers and explains correctly!
    12·2 answers
  • Hi, I have a question if I calculate the average force that must be exerted on a 0.145 kg baseball for me to give it an accelera
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!