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
Cloud [144]
3 years ago
15

You are given an unknown solid substance of mass 500 g and you want to estimate its specific heat. unfortunately, you don’t have

a thermometer handy. instead, you throw the substance into a bucket of boiling water and wait until its in equilibrium with the boiling water. you then remove the hot substance from the boiling water and put it into a beaker with 400 ml ethyl alcohol at room temperature. immediately after adding the hot substance into the beaker, the volume scale reads 430 ml. after a while, when the alcohol and the substance reach equilibrium, the volume scale reads 429 ml.
What is the specific heat of the substance?
Hint: Assume that no heat was neither lost during the transfer nor to the environment. You can neglect the mass of the beaker. Room temperature is approximately 20 deg C and the density of ethyl alcohol is 789 kg/m^3.

A) 385 J/(mol K)
B) 4,057 J/mol K)
C) 2,090 J/(mol K)
D) 449 J/(mol K)
E) 7,500 J/(mol K)
Physics
1 answer:
Julli [10]3 years ago
7 0

Answer:

Option C) 2,090 J/(mol K)

Explanation:

Data:

Volume in the beaker = 429 ml

temperature  = 20° C

Density = 789 kg/m³

Equilibrium reading = 429

volume change = 29 ml

                          = 0.029 L

Energy change = mcΔT

                       U + PΔV

You might be interested in
2.85 A police car is traveling at a velocity of 18.0 m/s due north, when a car zooms by at a constant velocity of 42.0 m/s due n
katrin2010 [14]

Answer:

11.1 s

Explanation:  

Speed of the police car as given = v = 18 m/s

Speed of the car = V = 42 m/s

Reaction time = t = 0.8 s

Distance traveled by the police car during the reaction time = d₁= 0.8 x 18 = 14.4 m

Distance traveled by speeding car = d₂ =0.8 x 42 = 33.6 m

Acceleration of the police car = a = 5 m/s/s

The police car can catch the speeding car only if it travels a distance equal to the speeding car in a time t.

Distance traveled by the police car = D = d₁ + v t +0.5 at², according to the kinematic equation.

⇒ D = 14.4 + 18 t + 0.5 (5) t²

⇒ D = 14.4 + 18 t+2.5 t²  → (1)

For the speeding car, distance traveled is D = 33.6 + 42 t, since it is constant velocity. Substitute for D from the above equation (1).

⇒ 14.4 + 18 t+2.5 t²=  33.6 + 42 t

⇒ 2.5 t² -24 t - 19.2 = 0

⇒ t = 10.3 s

Total time = t +0.8 s

⇒ Time taken for the police car to reach the speeding car = 10.3+0.8= 11.1 s

5 0
3 years ago
What is the mass of a dog house on Jupiter if the house weighs 1,040 N and the acceleration due to gravity on Jupiter is 26 m/s?
marshall27 [118]

Answer:

40kg

Explanation:

1040/26=40

5 0
2 years ago
Find the absolute value of the change of the gravitational potential energy (GPE) of the puck-Earth system from the moment the p
jekas [21]

Answer:

0.16joules

Explanation:

Using the relation for The gravitational potential energy

E= Mgh

Where,

E= Potential energy

h = Vertical Height

M = mass

g = Gravitational Field Strength

To find the vertical component of angle of launch Where the angle is 22°

h= sin theta

So E = mghsintheta

= 0.18 x 0.98 x 0.253 sin22

=0.16joules

Explanation:

7 0
3 years ago
A uniform marble rolls down a symmetric bowl, starting from rest atthe top of the left side. The top of each side is a distanceh
Debora [2.8K]

Answer:

A. 5/7h

B. Same height

C. See attachment below

Explanation:

Find the attachment below for better understanding.

7 0
3 years ago
What is the driving force of charge around a circuit
Virty [35]
A force of charge that drive around a circuit is call electeons
5 0
3 years ago
Other questions:
  • Please help me please<br>​
    10·1 answer
  • The 2-Mg truck is traveling at 15 m/s when the brakes on all its wheels are applied, causing it to skid for 10 m before coming t
    6·1 answer
  • PLEASE ANSWER QUICK!! A student pushes a wagon full of bricks with a constant force across the ground. Which of
    9·1 answer
  • A point source at the origin emits sound of frequency 175 Hz uniformly in all directions. On the x-axis at x=100 m, the sound in
    8·1 answer
  • Two identical point charges are fixed to diagonally opposite corners of a square that is 0.715 m on a side. Each charge is +4.0
    5·1 answer
  • Imagine that you move a substance from one container to another and it's volume changes, what state of matter is that substance?
    6·1 answer
  • A massless, hollow sphere of radius R is entirely filled with a fluid such that its density is p. This same hollow sphere is now
    15·1 answer
  • What causes scientific knowledge to change over time?
    15·2 answers
  • Does the Sun actually turn dark during a total solar eclipse? Why or why not?
    6·2 answers
  • What is a law in physics?​
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!