In a coffee-cup calorimeter experiment, 10.00 g of a soluble ionic compound was added to the calorimeter contained 75.0 g H2O initially at 23.2°C. The final temperature of the solution was 31.8°C. What was the change in enthalpy for the dissolution of this compound?
Answers
Answer:
The enthalpy for dissolution is - 305.558 J/g
Solution:
Mass of the ionic compound, m = 10.00 g
Mass of water, m' = 75.0 g
Initial temperature, T =
Final Temperature, T' =
Now,
To calculate the change in enthalpy:
We know that the specific heat of water is 4.18
Total mass of the solution, M = m + m' = 10.00 + 75.0 = 85.0 g
Temperature, difference,
Thus
The heat absorbed by the solution is given by:
Enthalpy,
Related Questions
According to Newton's 2nd law of motion, Jim can throw a _____ farther than a _____. tennis ball, basketball can of soda, liter bottle of soda chair, couch all of the above
Which avtivties belongs on top of physical activity pyramid
An object in projectile motion will follow wich path
The weight of a body floating in a liquid is
Answers
Most likely all.
The reason is since the acceleration of gravity is about 10 m/s^2 this means that gravity would cause all objects to accelerate at the same rate. So most likely all objects.
Answers
Answer:
Between 23,000 to 54,000 Hz
Final answer:
A dog whistle typically emits sound at frequencies above 20,000 Hz but below 60,000 Hz, which is a range humans cannot hear but dogs can.
Explanation:
The frequency of sound emitted by a dog whistle is typically above the range of human hearing, which upper limit is around 20,000 Hz. However, since dogs can hear up to about 60,000 Hz, you would expect a dog whistle to emit sound at frequencies above 20,000 Hz but below 60,000 Hz. So, a frequency anywhere within the range 20,000 Hz and 60,000Hz would be suitable for a dog whistle.
Learn more about Dog Whistle here:
#SPJ3
B. a liquid.
C. a gas.
D. both b and c
Answers
Answer:
Solids
Explanation:
Solids have definite shapes and definite volumes. The forces of attraction between the molecules of a solid substance are strong and the intermolecular spaces are very small. Due to this, the motion of molecules within a solid substance are very difficult that they only vibrate in their positions.
For liquids, they have definite volumes and indefinite shapes. The forces of attraction between the molecules of a liquid are intermediate and the the intermolecular spaces are intermediate as well. Due to this, the motion of molecules within a liquid substance is not as difficult as it is within solids.
Finally, for gases, they have indefinite shapes and indefinite volumes. The forces of attraction between the molecules of a gas are weak and the intermolecular spaces are large. Due to this, the motion of particles of gas is very easy.
Hope this helps :)
Final answer:
The forces of attraction limit the motion of particles most significantly in solids because particles in a solid are closely packed and have stronger forces of attraction, which hold them tightly in fixed positions.
Explanation:
The forces of attraction between particles limit motion most significantly in a solid (Option A). In a solid, particles are closely packed together and have the least amount of freedom to move, compared to particles in a liquid or gas. This is because the forces of attraction in a solid are very strong, holding particles tightly in fixed positions. In contrast, particles in liquids and gases have more freedom to move as the forces of attraction are weaker.
However, this does not mean that particles in a liquid or gas do not experience forces of attraction. They do, but the forces are weaker in comparison to solids, allowing for more movement. Hence, solids are the state of matter in which forces of attraction limit the motion of particles most.
Learn more about Forces of Attraction here:
#SPJ6
Answers
A cart rolling down an incline for 5.0 seconds has an acceleration of 4.0 m/s .If the cart has an initial speed of of 2.0 m/s and its final speed is calculated as 22m/s.
Given data is,
Time t = 5 seconds
Acceleration a = 4 m/s
Initial speed u = 2 m/s.
What is velocity?
Velocity is defined as the rate of change of object's position with some function of time.
Mathematically, Velocity can be defined by the ratio of distance and time.
Velocity = Distance/ time.
The velocity after a certain time of acceleration can be described with the formula as,
V = u + at
where, v is the final velocity,
u is the initial velocity,
a is the acceleration,
t is the time.
Substituting all the given values in the formula,
V = 2 + ( 4x5)
= 2 + 20
V = 22m/s
The final velocity of a cart rolling down can be calculated as 22 m/s.
To know more about the velocity,
#SPJ5
Answer: solve it with the following formula:
Vf = Vi + at
Final velocity = initial velocity + ( acceleration × time)
Explanation:
Putting the values
Vf = 2.0m/s+ 4.0m/s²× 5.0s
Vf = 2.0m/s +20.0 m/s (m/s² × s = m/s)
Vf = 22.0 m/s
B. density=mass*volume
C. density=volume/mass
D. density=mass + volume
Answers
D = M/V
D = (40.5 kg)/ (15 m^3)
D = 27/10 or2.7 kg/m^3
Answer:
My answer is A.
Explanation:
by using a density triangle, you would have to cover up the density and then it will show you, m over v. so that means you would have to divide.
Answers
Answer:
Thermal convection
Explanation:
When ice cubes are placed in water, ice cubes start melting. This is because water transfers its heat to ice cubes until the temperature becomes equal and the process is called "thermal Convection".
Thermal convection is the mode of transfer of heat energy that will occur when ice cubes will be added to the hot water and at the end of the experiment when both are at the same temperature, no ice cube will left.
Hence, the correct answer is "thermal convection".