[tex]\bold{\huge{\blue{\underline{ Solution}}}}[/tex]
We have given in the question that,
4kg of ice melts at the specific latent heat of fusion of water is 334,000 J/kg .We know that,
Amount of heat required = Mass * specific heat * change in temperature
[ Specific Latent heat of fusion is the amount of heat required to change one mole of substance from solid to liquid phase without changing in temperature .]
But, For complete melting of substance without change in temperature
Amount of heat required = Mass * Specific latent heat of fusion
Subsitute the required values,
[tex]\sf{\red{ Q = MCl}}[/tex]
Where,
Q = Amount of heat required M = Mass of the substance Cl = Specific latent heatNow,
[tex]\sf{ Q = 4 × 334000}[/tex]
[tex]\sf{ Q = 1336000 J }[/tex]
[tex]\sf{ Q = 1336 KJ }[/tex]
Hence, The amount of heat required to melt 4kg ice is 1336KJ
[tex]\bold{\red{ Option\: A \:is\: correct }}[/tex]
Taking into account the definition of calorimetry and latent heat, the heat energy required to melt 4 kg of ice when the specific latent heat of fusion of water is 334,000 [tex]\frac{J}{kg}[/tex] is 1,336 kJ.
CalorimetryCalorimetry is the measurement and calculation of the amounts of heat exchanged by a body or a system.
Latent heatLatent heat is defined as the energy required by a quantity of substance to change state.
When this change consists of changing from a solid to a liquid phase, it is called heat of fusion and when the change occurs from a liquid to a gaseous state, it is called heat of vaporization.
The heat Q that is necessary to provide for a mass m of a certain substance to change phase is equal to
Q = m×L
where L is called the latent heat of the substance and depends on the type of phase change.
Heat energy required to melt iceIn this case, you know:
m= 4 kgL= specific latent heat of fusion of water= 334,000 [tex]\frac{J}{kg}[/tex]Replacing in the expression for latent heat:
Q = 4 kg× 334,000 [tex]\frac{J}{kg}[/tex]
Solving:
Q= 1,336,000 J= 1,336 kJ (being 1,000 J= 1 kJ)
Finally, the correct answer is the first option: the heat energy required to melt 4 kg of ice when the specific latent heat of fusion of water is 334,000 [tex]\frac{J}{kg}[/tex] is 1,336 kJ.
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what is 37degrees Celsius in Si units
Answer:
310.15 Degrees Kelvin
Explanation:
37 Degrees Celsius = 310.15 Degrees Kelvin = 98.6 Degrees Fahrenheit
Conversion Factor from Celsius to kelvin
or 37 + 273 = 310 Degrees Kelvin
A pure substance __________ . must be an element. can be separated into simpler substances by physical means. has different chemical and physical properties depending on its source. can be separated into simpler substances by chemical means.
Answer:
a pure substance has different chemical and physical properties depending on its source
How many moles of H2O2 are produced in the production of hydrogen peroxide when 13 grams of oxygen are used
The electron configuration of element Y ends in s?p4. What is
the symbol for the ion most commonly formed by this element?
a y2+
b y2-
с ү6+
d Y
This problem is providing us with the end of the electron configuration an element as s²p⁴ and asks for the most commonly formed ion. At the end, the answer is b Y²⁻.
Electron configurationIn chemistry, when analyzing electron configurations, one must first take into account how the energy levels must be filled with electrons.
Now, note the problem states that the electron configuration ends by s²p⁴, which means it is closer to complete the octet so it needs two electrons in order to do so, as it behaves as a nonmetal.
Therefore, the most commonly ion formed by this element is Y²⁻, because of the fact that it needs two electrons to complete the octet and thus become chemically stable and likely to bond with a metal.
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Elements on the right side of the periodic table are called.
Answer:
Nonmetals is the answer!
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Answer:
NONMETALS. :)
Explanation:
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Copper(I) nitrate, CuNO3, is dissolved in water and forms a transparent, blue mixture. What type of mixture is it
Radiant energy is emitted from all objects with temperatures greater than ____________. This means ____________ objects emit radiant energy.
Radiant energy is emitted from all objects with temperatures greater than ABSOLUTE ZERO. This means ALL objects emit radiant energy.
Radiant Heat and TemperatureRadiant heat is a type of energy that largely depends on the temperature of an object.
This type of energy (radiant energy) is emitted from all objects and can be observed when heat is absorbed on the surface of another material.
Radiant energy can be defined as a type of electromagnetic energy.
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Calcium-49, a radioactive isotope, has a half-life of 9 minutes. If an 80-gram sample of the isotope decays for 27 minutes, how many grams of the original sample remain?
Select one:
a. 60
b. 10
c. 40
d. 20
Which statement best describes the characteristics of the Sun?
Red in color
at the center of our galaxy
Hotter than most stars
medium in size
If you transfer energy into two substances which one would melt first
Answer:
The substance with a weaker molecular attraction
A cube of sugar has the length of one side 4cm.find its volume
Answer:
64
Explanation:
since it's a cube all sides are equal
and to calculate volume you multiply the length by the hieght by the width
What is the molecular formula for a compound that is 46.16% carbon, 5.16% hydrogen and 48.68% fluorine if the molar mass of this compound is 156.12 g?
C6H8F4
C5H10F5
C6H6F3
Girls are usually completely physically mature by _____ years old. A. 17 B. 19 C. 14 D. 21.
Answer:
A. 17
Explanation:
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What does an electrically neutral atom have the same number of?
protons and electrons
protons and neutrons
electrons and neutrons
protons, electrons, and neutrons
Answer:
it has an equal number of negative electric charges (the electrons) and positive electric charges (the protons).
Explanation:
So in all of the answers it would be A. Protons and Electrons
A sample of hydrogen exerts a pressure of 0.429 atm at 50.00°C. The gas is heated to
95.00°C at a constant volume. What will its new pressure be?
Answer:
5.847atm
Explanation:
according to Gay- Lussac's law
P1/T1 =P2/ T2
How does carbon dioxide affect the Earth's climate?
Question 17 options:
Carbon dioxide is being added to the soil, which causes weather phenomenon.
Carbon dioxide mixes with water vapor to take harmful chemicals out of the air.
While carbon dioxide is in the air waiting to be reabsorbed it traps the sun's heat.
Answer:
While carbon dioxide is in the air waiting to be reabsorbed it traps the sun's heat.
Why must a solution of naoh be standardized using a primary standard, such as khp?.
Select the correct answer. Which statement about cellulose is true? A. It’s a synthetic polymer. B. It’s a raw material used to make plastic. C. It’s produced using oil and gas. D. It’s used to make paper products.
Answer:
It's used to make paper.
Explanation:
Plato answer.
What are two basic categories of matter
What color of light is emitted from an excited hydrogen atom where the electron has been promoted to n
Answer:
n1 = 2, n2 = 4
1/wavelength = 1.097*10^7[1/2^2 — 1/4^2]
1/wavelength =0.20568*10^7
wavelength = 486.192*10^-9 Or
wavelength = 486.19 nm (blue color)
Explanation:
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The decomposition of A to B is a first-order reaction with a half-life of 32.8 min:
A → 2B
If the initial concentration of A is 0.595 M, how long will it take for the concentration of A to decrease by 10.4 %?
does this image show a physical or chemical change?
Answer:
Physical
Explanation:
When a substance changes from liquid to gas it's a physical change. There is no chemical reaction between the rubbing alcohol or anything else that would change it's chemical composition.
Coryell walks 11 km south, and then turns east and walks 13 km. What is his
distance?
Answer:
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lemon and amla have a sour taste. why
Answer:
They both contain citric acid.
Explanation:
Citric acid is sour and is found in citrus fruits such as lemon and amla. Acids usually have a sour taste and therefore lemon and amla are sour.
[WILL MARK BRAINLIEST!!] Describe the relationship between molecular structure and the strength of electrostatic
forces between molecules. How does this impact boiling and melting points?
Answer:
increase the bonding strength between two or more molecules
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Explanation:
Boiling points and melting points
The overarching principle involved is simple: the stronger the noncovalent interactions between molecules, the more energy that is required, in the form of heat, to break them apart. Higher melting and boiling points signify stronger noncovalent intermolecular forces.
The materials are carried in a cell by the what
Answer:
The endoplasmic reticulum
what type of energy transfer occurs as a coiled spring is released
Answer:
When a spring is coiled up or a rubber band is stretched, mechanical energy is stored in it. When the spring uncoils or the rubber band snaps back, this energy is released. This stored mechanical energy is called potential energy because it has the potential to make things happen.Explanation:
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According to the Law of Conservation of Matter, what happens to atoms of gas in a balloon when it is placed in the freezer?
the number of atoms stays the same and the energy stays the same, keeping the volume the same
the number of atoms stays the same as the atoms lose energy to the colder freezer, slow down, get closer together, shrinking the volume
the number of atoms increases, causing an increase in energy and an increase in volume
the number of atoms decreases, which takes up less space and decreases the volume
Answer:
the number of atoms stays the same as the atoms lose energy to the colder freezer, slow down, get closer together, shrinking the volume
Explanation:
When a liquid is cooled, the average energy of the molecules decreases. At some point, the amount of heat removed is great enough that the attractive forces between molecules draw the molecules close together, and the liquid freezes to a solid.
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What must occur before a newly made polypeptide is secreted from a cell?.
Answer: Your answer is Its signal sequence must target it to the ER, after which it goes to the Golgi.
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Bile salts play a crucial role in gastrointestinal homeostasis and digestion. Which phrase is the BEST description of the gastrointestinal function of bile salts?
Answer:
bile salts emulsify fats and break them down into smaller particles which gives the enzyme lipase a greater surface area to act on during digestion of fats.
Explanation: