how much heat is released when 32g of water cools from 46°C and freezes

Answers

Answer 1

The amount of heat released when 32g of water cools from 46°C and freezes is 6182.4 J

Heat: This is a form of energy that brings about the sensation of warmth. The S.I unit of heat is Joules (J)

⇒ Formula:

Q = cm(t₂-t₁).................. Equation 1

⇒ Where:

Q = amount of heat releasedc = specific heat capacity of waterm = mass of watert₁ = Initial temperaturet₂ = Final temperature

From the question,

⇒ Given:

m = 32 g = 0.032 kgt₁ = 46 °Ct₂ = 0 °C (Freezing point)c = constant = 4200 J/kg.°C

⇒ Substitute these values into equation 1

Q = 0.032(4200)(0-46)Q = -6182.4 J

Note: The negative sign tells that heat is released and as such can be ignored.

Hence, The amount of heat released is 6182.4 J

Learn more about heat here: https://brainly.com/question/9614649


Related Questions

what is the magnitude of the acceleration that is produced when the brakes of a 2.4 x 10
cubed kg car apply a 3.2 x 10 cubed N force to stop the car

Answers

Answer:

b 1.3 m/s

Explanation:

newton's second law of motion

Why does a light bulb turn in When you flip the switch to on?

Answers

Explanation:

Flipping a light switch to turn on a light means that the circuit with the light is being closed. When the switch is flipped the opposite way, to turn the light off, the circuit is being opened.

Answer:

You now have an open circuit

Explanation:

The circuit is closed when the switch is flipped the other way to turn off the light.

How many total atoms does 3Na2S2O3 have

Answers

Answer:

21

Explanation:

Let us count the number of individual atoms for Na2S2O3 (the compound name):

Na: 2

S: 2

O: 3

This brings us to a total of 7 atoms for one molecule of sodium thiosulfate. For three of these compounds, we get 3*7=21

When you take a hot shower, the
a
shower curtain sometimes moves
into the shower towards you. Why
does this happen?

Answers

With hot water comes hot steam, it fills the shower area with steam which raises the air temperature and the air then rises out of the shower

If the pressure, volume, and temperature of a gas are known, which can most likely be found by using the ideal gas law?
the molar amount of the gas
the partial pressure of the gas
the standard temperature and pressure
the molar mass

Answers

the correct answer should be: the molar amount of the gas.

Answer:

the molar amount of the gas.

Explanation:


c) A substance has a high melting point and conducts electricity. What type of structure does it have

Answers

Answer:

Metallic structure

Explanation:

They have a high melting point due to the strong forces of attraction between the positive ions (cations) and the delocalised electrons. Moreover, they conduct electricity due to the sea of delocalised electrons.

[Extra: It could be an ionic compound since they also have a high melting point, however they only conduct electricity in liquid or aqeouus state.]

What is an example of thermal energy

A) batteries moving a toy
B) riding a bicycle
C) plugging in a tv
D) using an oven to cook

Answers

D because your using heat I’m guessing

Which animal is found in the desert?

monkeys

parrots

buffalo

meerkats

Answers

Answer:

meerkats

Explanation:

the ability to conduct electricity is a characteristic of metallic bonding. this characteristic is best explained by the presence of ________________.

Answers

Electric current but I’m not sure

All atoms of an element are______.

Points: 87

Answers

Answer:

Alike

Explanation:

Which statement is correct about charges?
A.Opposite charges repel
B.Similar charges attract
C.Electrons are positively charged
D.Similar charges repel

Answers

Answer:

A.Opposite charges repel

[tex] \: \: \: \: [/tex]

D.Similar charges repel

correct me if I'm wrong

hope it helps

What do these red/yellow/orange-precipitate reactions have in common? (choose
the best answer)

They all made the same color.

They all have a barium (Ba+2) cation.

They all have a chromate (CrO4-2) ion.


They all have a chloride ( C1-1) ion.

Answers

Answer:

3 is the correct I think so

Answer:

They all have a chromate (CrO4-2) ion.

Explanation:

A tank of syngas produced by coal gasification contains 60.0% carbon monoxide, 30.0% hydrogen, and 10.0% carbon dioxide. What is the mass of hydrogen (in g) in 1.00 cubic meter of this syngas mixture at 1.00 atm and 25.0 °C? (1 m³ = 1000 L)

Answers

Considering the ideal gas law, the mass of hydrogen is 24.552 grams.

An ideal gas is a theoretical gas that is considered to be composed of randomly moving point particles that do not interact with each other. Gases in general are ideal when they are at high temperatures and low pressures.

An ideal gas is characterized by three state variables: absolute pressure (P), volume (V), and absolute temperature (T). The relationship between them constitutes the ideal gas law, an equation that relates the three variables if the amount of substance, number of moles n, remains constant and where R is the molar constant of the gases:

P× V = n× R× T

In this case, you know:

P= 1 atmV= 1 m³= 1000 Ln= ?R= 0.082[tex]\frac{atmL}{molK}[/tex]T= 25 °C= 298 °K

Replacing in the ideal gas law:

1 atm× 1000 L = n× 0.082[tex]\frac{atmL}{molK}[/tex]× 298 K

Solving:

[tex]n=\frac{1 atmx1000 L}{0.082 \frac{atmL}{molK}x298 K}[/tex]

n= 40.92 mol

The mol of syngas mixture is 40.92 mol.

Syngas mixture contains 30.0% hydrogen. So, there is a mol fraction of [tex]x_{hydrogen} =[/tex]0.3 . Thus, the mols of hydrogen in syngas mixture is calculated as:

40.92 moles of syngas mixture× 0.3= 12.276 moles of hydrogen

Finally, being the molar mass of hydrogen H₂ 2 [tex]\frac{g}{mole}[/tex], then the mass is:

[tex]12.276 molesx\frac{2 grams}{1 mole}[/tex]= 24.552 grams

In summary, the mass of hydrogen is 24.552 grams.

Learn more about ideal gas law:

https://brainly.com/question/4147359?referrer=searchResults

A sample of gas occupies 20 mL at -109 degree C. What volume does the sample
occupy at 65 °C?

Answers

Answer: V2= 41.2mL

Explanation:

Givens:

* V1= 20ml

* T1 = -109 ⁰C --> K= ⁰C + 273.15 --> 164.15 K

* V2 = ??

* T2= 338.15 K

Use Charles law V1/T1 = V2/T2

Since we are looking for V2 we can rearrange the formula to

V2= (T2 x V1) /T1

V2= (338.15K x 20mL) / 164.15 K

V2= 41.2mL

NOTE:

Temperature should always be in K not in ⁰C or ⁰F

To convert from C to K use

*K= ⁰C + 273.15

Enter your C value in the ( ⁰C ) and you can get K

The material used as a biological sensor is one dimension of 20 mm, the other Are in nanometers ​

Answers

Answer: 20 , 40

I want know the answer now !

What eats a FawnsFoot Mussel?

Answers

Answer:

I have no Idea please give more context to your question.

Explanation:

What is the wavelength of the above wave?

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Answer:

well what above wave?? do you have a picture

Explanation:

Is sweat a chemical? I am curious to know! NO LINKS OR TROLLS

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Answer:

no

Explanation:

stop troll hate

Research the future of energy production. What improvements to (or new methods of) electrical energy production are scientists currently developing? How will they improve on present methods of energy production (what makes these new methods better than the old)? What are the cons of these improvements?

Answers

Answer:

Fossil fuels like coal, oil and natural gas supply 80 percent of the world’s energy to warm homes, charge devices and power transportation. They are also the primary human source of greenhouse gas emissions. Stanford scientists broadly agree that curtailing our use of fossil fuels would have significant benefits like improving health and reducing the number and severity of natural disasters, but it’s not yet clear what can replace them.

Explanation:

How many molecules are in 1.3 moles of water?​

Answers

Answer:

7.8286e+23

Explanation:

Use Avogadro's number

A 100 watt solar power panel usually costs $146 they are on sale for 0.75 of the regular price what is the sale price

Answers

Answer: $109.5
Multiply $146 (original price) by 0.75 (the percentage) and there’s your answer!

pls some one help
1 mark question

Answers

Answer:

The atomic number of Chlorine(Cl) is 17 and the electronic configuration is 2,8,7 with seven electrons in the valence shell.

Hope that helps. x

Answer:

See below

Explanation:

Chlorine has 17 electrons in it's shell.

(See the attached file to get the idea of what subshell would be filled first).

The accommodations:

s = 2 electrons

p = 6 electrons

d = 10 electrons

f = 14 electrons

Now, the electronic configuration of chlorine:

1s²2s²2p⁶3s²3p⁵

(2+2+6+2+5 = 17 electrons)

[tex]\rule[225]{225}{2}[/tex]

Hope this helped!

~AH1807

Please Help
Predict the nature of the indicated covalent
bond. Polar or Non polar

Answers

Answer:

Nonpolar

Explanation:

which of the following atom could reside in the same group? Explain your answer

Answers

Can you send a picture? or explain further? Atoms of elements that are in the same group have the same number of Valence Electrons.

what describes the pool of electrons in metallic bonding?

Answers

In metallic bonding, the electrons are “surrendered” to a common pool and become shared by all the atoms in the solid metal. Metallic bonding is found in metals and their alloys. When the atoms give up their valence electrons, they form ions. These ions are held together by the electron cloud surrounding them.

What is x?





a
28
b
44
c
224
d
136

Answers

Answer:

Hope answer is right, d=136

how do you find a mole (i need an example) i hate chem pls help

Answers

Answer:

I'm pretty sure its just the mass of the sample divided by the molar mass

for example if I had like 7g of carbon and wanted to find the moles, I would divide the mass I have (7g) by the molar mass (the atomic mass value on your periodic table, in this case for carbon it would be 14g)

moles = [tex]\frac{mass}{molarmass} = \frac{7}{14} = 0.5\ moles[/tex]

Hope this helped

the valence electrons of metals jump easily to a higher energy orbital when light shines on them then they all fall emiting the excess energy as light which property of metals is explained by this?​

Answers

Answer:

Lustrous

Explanation:

Metals are lustrous which gives them a property of having Shiny surfaces

The valence electrons of metals jump easily to a higher energy orbital when light shines on them then they all fall emitting the excess energy as light show lustrous  property of metals.

What are valence electrons?

Valence electrons are defined as a negatively charged particle that can be shared or transmitted between atoms that is found in the outermost shell of an atom. Valence electrons have a crucial role in determining how an atom will behave. The electrical configurations of elements can be used to find valence electrons. The total number of valence electrons in that element is then determined by counting the number of electrons in the outermost shell.

When newly treated, polished, or broken, a material takes on a bright look and conducts electricity and heat reasonably well. Metals are typically ductile and malleable. These traits are the result of the metallic bond that connects the atoms or molecules of the metal.

Thus, the valence electrons of metals jump easily to a higher energy orbital when light shines on them then they all fall emitting the excess energy as light show lustrous  property of metals.

To learn more about valence electrons, refer to the link below:

https://brainly.com/question/13993867

#SPJ2

the boiling point of water at standard pressure is

Answers

Answer:

100 Celsius mostly because water boils at sea level

How many atoms are in 80.45g of magnesium

Answers

Answer:

see below

Explanation:

1. 1 mol Mg = 24.31 g = 6.02 *10^23 atoms

     calculate the number of atomsin 80.45g Mg

         Numberof atoms = 6.02*10^23 Mg atoms / 24.31 g * 80.45 g

                                    = 1.99*10^24 atoms

2.1 mol C-12 = 12.01g = 6.02 * 10^23 atoms

    calculate the mass using

                                       = 12.01 g C / 6.02*10^23 atoms * 100 atoms

                                       = 1.99 * 10^-21 g

Answer:

1.9926 * 10 ^24 

Explanation:

Molar Mass - Use Periodic table!

M ( Mg ) = 24.31 g / mole

n = 80.45 g : 24.31 g/mole = 3.31 moles

N a ( Avogadro`s constant ) = 6.02 * 10 ^23

N = Na * n = 6.02 * 10 ^24 * 3.31 = 19.926 * 10 ^23

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