At 25C, the following heats of reactions are known: 2 ClF (g) + O2 (g) ---> Cl2O (g) + F2O Hrxn = 167.4 kJ/ mol ; 2 ClF3 (g) + 2O2 (g) ---> Cl2O (g) + 3F2O (g) Hrxn = 341.4 kJ/ mol ; 2F2 (g) + O2 (g) ---> 2F2O (g) Hrxn = -43.4 kJ/mol. At the same temperature, use Hess's law to calculate Hrxn for the reaction: ClF (g) + F2 (g) ---> ClF3 (g).

Answers

Answer 1

The heat of reaction for ClF (g) + F2 (g) → ClF3 (g) is -174.0 kJ/mol at 25C, calculated using Hess's Law by subtracting the enthalpies of the intermediate reactions from the target reaction.

To calculate the heat of reaction for ClF (g) + F2 (g) → ClF3 (g), we can use Hess's Law, which states that the heat of reaction for a chemical reaction is independent of the pathway taken and depends only on the initial and final states.

First, we can write the target reaction as the sum of the intermediate reactions:

ClF (g) + F2 (g) + 2 O2 (g) → Cl2O (g) + F2O (g) + 2 F2O (g)

2 ClF3 (g) + 2 O2 (g) → Cl2O (g) + 3 F2O (g)

2 F2 (g) + O2 (g) → 2 F2O (g)

Next, we can manipulate the intermediate reactions to cancel out the Cl2O (g) and F2O (g) on both sides of the equation:

ClF (g) + F2 (g) + 2 O2 (g) → 2 ClF3 (g) + 2 O2 (g) + 2 F2 (g)

2 F2 (g) + O2 (g) → 2 F2O (g)

Finally, we can add the two manipulated reactions and simplify to obtain the target reaction:

ClF (g) + F2 (g) → ClF3 (g)

The heat of reaction for ClF (g) + F2 (g) → ClF3 (g) is therefore -174.0 kJ/mol, calculated by subtracting the enthalpies of the intermediate reactions from the target reaction.

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Related Questions

I NEED HELP ASAP, If you help me I’ll give you Brainlist [Calorimetry and specific heat lab]
I don’t know how to calculate the error %
The formula is:
%Error = [I Accepted value-Experimental value I / Experimental value] x 100 can someone please PLEASE help me :(

Answers

Answer:

Explanation:

I gave this formula as

What you should get - what you got

---------------------------------------------------   * 100

What you should get

Suppose you are talking about the specific heat of copper and you did a lab and did it fairly well and the specific heat came out to be 0.33

That's what you got, 0.33

What you should get is 0.35 according to the table you've given us.

% error = 0.35 - 0.33

                -------------- * 100

                      0.35

% error = 0.02 * 100/ 0.35

% error = 2/0.35

% error = 5.71

Now here is the really hard part. You have to decide what a positive error is and what a negative error.

A positive error using this formula means you are too low.

A Negative error means that you are too high, just the opposite of what you might think.

Can you show us the experimental value?

So basically, the accepted value would be under the Specific heat capacity of metal (e.g. 0.90, 0.35, 0.44, 0.12).

Your experimental value would be the specific heat capacity that you got from the lab.

You would first substract the experimental value from the accepted value

[tex]accepted \: value - experimental \: value [/tex]

and then you would divide the result by the experimental value

[tex]result \div experimental \: value[/tex]

and then, you would multiply the result of that by a hundred to get your percentage

[tex]result \times 100 = \% \: error[/tex]

//

The image shown is an example.

0.90 is our accepted value.

0.88 is our experimental value.

The overall percentage error I got is %2.27

c) A football feels hard on a hot day but feels softer in the evening​

Answers

Answer: ^_^

Explanation:

its because during day time the ball becomes heated up and the air inside it try to come out as the heat air always try to go up swelling up the ball,

so in the evening when the air cools down the ball too cools down and air inside it also cools down making the ball feel soft,

Therefore, a football feels hard on a hot day but feels softer in the evening​

Hope it helped u,

pls mark as the brainliest

^_^

Answer:

its because during day time the ball becomes heated up and the air inside it try to come out as the heat air always try to go up swelling up the ball,

so in the evening when the air cools down the ball too cools down and air inside it also cools down making the ball feel soft,

Therefore, a football feels hard on a hot day but feels softer in the evening​

Hope it helped u,

pls mark as the brainliest

Explanation:

¿Qué es la ciencia? ¿Qué importancia tiene la ciencia para el desarrollo de la humanidad y de la vida? AYUDA PORFAAAAAAAA

Answers

Explanation:

La ciencia puede entenderse como una forma que el ser humano encontró para adquirir conocimientos a través de métodos científicos, tecnológicos y basados ​​en estudios, pruebas e investigaciones y no basados ​​en el pensamiento para explicar los fenómenos humanos, de la naturaleza y de la vida.

La ciencia tiene un rol impactante y transformador en la sociedad, todo el conocimiento adquirido por el hombre a través de la ciencia ha transformado para mejor la vida de las personas, generando mayor calidad de vida, salud, educación, sentido crítico, etc.

En el escenario pandémico que vive el mundo actualmente, la ciencia es fundamental, a través de sus estudios e investigaciones que han ayudado en el desarrollo de vacunas efectivas para inmunizar a los humanos contra el virus y salvar vidas.

[urgent]

What would the [OH-] of a solution that has a pOH of 2.7 be?

Answers

Answer:

[OH⁻] = 0.002 M

Explanation:

The definition of pOH is similar to the definition of pH:

pOH = -log[OH⁻]

This means that with a given pOH value, the calculation of [OH⁻] is a matter of algebra:

2.7 = -log[OH⁻]-2.7 = log[OH⁻]

To remove the logarithm we increase 10 by the power of the pOH:

[tex]10^{-2.7}[/tex]=[OH⁻]0.002 M = [OH⁻]

HELP ASAP PLS AHHH ty

Answers

Answer: a for the first one , d for the second  one, b for the third one.

Explanation:

Answer:

A: Main sequence star.

B: White Dwarf.

C: Black hole.

Explanation:

Brainliest please.

When talking about the products of photosynthesis, why is it a HUGE issue when a vast amount of the rainforests is dying along with vast amounts of forests from fires/deforestation? Remember, we know that this hurts the ecosystems of animals living there, but what else does it effect?

Question 5 options:

the creation of oxygen


the creation of too much smoke


the creation of carbon monoxide


the creation of carbon dioxide

Answers

Answer:

the creation of oxygen.

Explanation:

What is the volume of a gas at 20°c
If its orginal volume at 60°C
is 300 cm?​

Answers

Explanation:

Using Charles law;

V1/T1 = V2/T2

Convert your temperatures to kelvin;

20+273=298k

60+273=333k

Then put the values the formula stated above

300/333 = V2/298

Make V2 the subject of the formula

V2= (300×298)/333

V2= 89400/333

V2= 268.47cm

Identify this reaction.
NH3 + H2SO4 → (NH4)2SO4
O decomposition
O synthesis
O double displacement
O single displacement

Answers

Answer: synthesis

Explanation:

Answer:

Synthesis

Explanation:

Two compounds combine to produce one compound

How many electrons are transferred when Be and O bond?
02
0
3
4.

Look at picture
ASAP please will mark as brainlist don’t got much time

Answers

Answer:

2 electron are transferred when Be and O bond formed

Answer:

2 is the answer:)))))))))

how many grams of fertilizer , for potassium sulfate are there in 42.3 mole of potassium sulfate? step by step

Answers

Answer:

The mass of 42.3 moles of potassium sulfate is 7,371.1557 grams

Explanation:

Potassium sulfate K₂SO₄ which is also known as sulphate of potash is a water soluble common component of fertilizer

The molar mass of potassium sulfate, M = 174.259 g/mol

The given number of moles of potassium sulfate, n = 42.3 moles

The mass, 'm', of a given number of moles of potassium sulfate, 'n', is given as follows;

m = n × M

Therefore, we have;

The mass, 'm', of 42.3 moles of potassium sulfate is found by plugging in the values for 'M', and 'n', in the above equation as follows;

m = 42.3 moles × 174.259 g/mol = 7,371.1557 grams

The mass of 42.3 moles of potassium sulfate, m = 7,371.1557 grams.

6) Mr. Collins finally decided to take this seriously and put both hands on the rope and applied a 500 N force to the left,
while Jared and James still struggled with their 300 N force to the right. What is the net force and direction of motion?

Answers

Answer:

I'm pretty sure the net force is 200 N and the direction of motion is left

Explanation:

500 - 300 = 200 and more force is coming from and pulling toward the left.

If an atom has 24 p+ and 24e-, what is the atomic number of this element?

Answers

Answer:

24

Explanation:

Because atomic number is the number of protons.

A permanent alteration in the DNA sequence that makes up a gene is called am
Mutation
Germline
Meiosis
Evolution

Answers

Answer:

Gene mutation

Explanation:

A gene mutation is a permanent alteration in the DNA sequence that makes up a gene, such that the sequence differs from what is found in most people. Mutations range in size; they can affect anywhere from a single DNA building block base pair to a large segment of a chromosome that includes multiple genes

Would definitely be a mutation

The F1-ion is classified as a(n).
and has:
A.anion, 1 valence electron
B.anion, 8 valence electrons
C.cation, 2 valence electrons
D.cation, O valence electrons

Answers

Answer:

B

Explanation:

The [tex]\rm \bold{F^1^-}[/tex] is the fluorine anion with 8 valence electrons. Hence, option B is correct.

An ion is defined as the atom with the change in the valence electrons by the loss or gain of electrons to complete the outer shell.

What type of ion is [tex]\rm F^1^-[/tex]?

The ions with the gain of electrons result in a negative charge and are termed anions. The ions with a loss of electrons have a positive charge and are termed cations.

The F is the halogen atom of group 17 with 7 valence electrons. The ion formed for F requires 1 electron to complete its valence shell.

The ion [tex]\rm F^1^-[/tex] has a negative charge, which denotes it gains an electron and forms anion.

The gain of electrons results in the number of valence electrons being 8.

Thus, [tex]\rm F^1^-[/tex] is the fluorine anion with 8 valence electrons. Hence, option B is correct.

Learn more about ions, here:

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HELPP!! I REALLY NEED TO BRING UP MY SCIENCE GRADE!!!!
Scientists studied the location of ____ to determine plate boundaries.

Answers

Answer:

Of earthquakes

Explanation:

Earthquake i think...

MARKING BRAINLIEST

options: Tempature
solid
melting point
time
condensation point
gas
freezing point
liquid
boiling point

Answers

Answer:

I LIKE TRAINS

Explanation:

SNAILS ARE YUMMY

Why are red blood cells red

Answers

Red blood cells are red because they contain Haemoglobin

What is the total number of atoms in the molecule HNO3?​

Answers

Answer:

We know that, composition of HNO3 is Hydrogen, Nitrogen and oxygen. Total number of atoms = 3+1+1=5 atoms are present in 1 molecule of HNO3.

please help which one is it it’s due in 1 hour

Answers

Answer:

carbon monoxide

Explanation:

I'm not sure but I think

what is biopolymer ?​

Answers

Answer:

Biopolymers are natural polymers produced by the cells of living organisms. Biopolymers consist of monomeric units that are covalently bonded to form larger molecules. There are three main classes of biopolymers, classified according to the monomers used and the structure of the biopolymer formed: polynucleotides, polypeptides, and polysaccharides.

Explanation:

Definition: Biopolymers are organic molecules that are composed of repeating monomers and produced by living organisms.

Which of the following ideas is NOT accepted as true according to today’s atomic theory?

a. Atoms are the basic unit of matter
b. Electrons move in circular
paths around the nucleus
c. Protons, electrons, and neutrons are smaller than the atom
d.The nucleus has charged and uncharged particles

Answers

Answer:

D

Explanation:

How many calories of heat are required to raise the temperature of 225g of water from 10.5°C to 43.7°C

Answers

This the answer to the question you asked:)

Se queman 87,0 g de butano con oxígeno produciéndose dióxido de carbono y agua. Calcular la masa de oxígeno necesaria y la masa de dióxido de carbono y de agua que se desprenderá

Answers

Answer:

312g O₂ son necesarios, se producen 264g CO₂ y 135g H₂O

Explanation:

La combustión de butano para producir CO₂ y H₂O ocurre así:

C₄H₁₀ + 13/2O₂ → 4CO₂ + 5H₂O

Donde 1 mol de butano reacciona con 13 moles de oxígeno para producir 4 moles de dióxido de carbono y 5 moles de agua.

Para resolver este problema debemos convertir la masa de butano a moles y, usando la reacción balanceada, obtener cuánto se necesita de oxígeno y cuánto se produciría de dióxido de carbono y agua:

Moles butano -Masa molar: 58.12g/mol-:

87.0g * (1mol / 58.12g) = 1.50 moles

Moles y masa de oxígeno necesarias para la reacción -Masa molar: 32g/mol-:

1.50 moles C₄H₁₀ * (13/2 moles O₂ / 1 mol C₄H₁₀) = 9.75 moles * (32g/mol) =

312g O₂ son necesarios

Moles y masa de dióxido de carbono producidas -Masa molar: 44.01g/mol-:

1.50 moles C₄H₁₀ * (4 moles CO₂ / 1 mol C₄H₁₀) = 6 moles * (44.01g/mol) =

264g CO₂ se producen

Moles y masa de agua producidas -Masa molar: 18.015g/mol-:

1.50 moles C₄H₁₀ * (5 moles H₂O / 1 mol C₄H₁₀) = 7.5 moles * (18.015g/mol) =

135g H₂O se producen

Look at the image below:
Pain Reyne
Ben Francia
Les Trans
01 Juan Bautista
Pents
SAN
PEAS FAULT
NORTH AMERICAN PLATE
CIRC PLATE
Carina
What type of plate boundary is shown here?
O convergent
divergent
transform

Answers

Answer:

Transform

see image below:

how can u launch make the model spacecraft move without touching it

Answers

Answer:

How can the launcher make the model spacecraft move without even touching it? ...

Magnetic forces can attract or repel objects at a distance. ...

They explore attracting and repelling forces with magnets and with the simulation. ...

Magnetic forces can convert potential energy stored in the magnetic field to kinetic energy.

Explanation:

The launcher can launch the model spacecraft by exerting a magnetic force.

Magnetic force is a force just like gravity that can act across a distance without touching the object that is attracted by it. It should be noted that magnetic attraction is a pulling force.

Therefore, since the launcher wants to make the model spacecraft move without touching it, a magnetic force should be exerted on it. The magnetic force can act as the distance that's required for the objects to move.

Read related link on:

https://brainly.com/question/17378094

What is the most basic level of biological organization?



Question 1 options:

Organism


Cell


Molecule


Atom

Answers

Answer:

molecule

Explanation:

Answer:

c

Explanation:

Please help fast, I will give brainliest.

Answers

Answer:

B

Explanation:

B is the answer if I’m not wrong

What does the reaction rate measure?

Answers

Answer:

It's C

Explanation:

cuz im goated

Scientists have changed the model of the atom as they have gathered new evidence. One of the atomic models is shown below.

Answers

The question is incomplete, The complete question is;

Scientists have changed the model of the atom as they have gathered new evidence. One of the atomic models is shown below. What experimental evidence led to the development of this atomic model from the one before it?

Answer:

A few of the positive particles aimed at a gold foil seemed to bounce back.

Explanation:

This model of the atom was proposed by Ernest Rutherford and was called the planetary model of the atom.

This model is based on an experiment using a gold foil on which alpha particles were focused. Most of the alpha particles passed through the foil. Some of the alpha particles were scattered at large angles and a few seemed to bounce back.

This led to the conclusion that the atom has a massive positive core around which electrons move as planets move around the sun.

Answer:

It is A

Explanation:

When calcium chloride and baking side is mixed, is it an example of chemical or physical change?

Answers

it’s a chemical change
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