Liquid mercury has a density of 13.690g/cm^3, and solid mercury has a density of 14.193 g/cm^3, both being measured at the melting point, -38.87 'C, at 1bar pressure. The heat of fusion is 9.75 J/g. Calculate the melting points of mercury under a pressure of (a) 10bar and (b) 3540 bar. the observed melting point under 3540 bar is -19.9'C

Answers

Answer 1

a) The melting point of mercury at 10 bar is -118.8°C.

b) The melting point of mercury at 3540 bar is -49.5°C

The melting point of mercury at different pressures can be calculated using the Clausius-Clapeyron equation:

ln(P2/P1) = -ΔHfus/R (1/T2 - 1/T1)

where P1 and T1 are the pressure and temperature at which the heat of fusion is known (1 bar and -38.87°C, respectively), P2 is the new pressure, T2 is the new melting point temperature, ΔHfus is the heat of fusion, R is the gas constant, and ln is the natural logarithm.

We can rearrange this equation to solve for T2:

T2 = (ΔHfus/R) * (ln(P2/P1)/(-1/T1)) + 1/T1

Substituting the given values, we get:

(a) For P2 = 10 bar:

T2 = (9.75 J/g / (8.314 J/(mol*K))) * (ln(10 bar/1 bar) / (-1 / ( -38.87°C + 273.15))) + (1 / (-38.87°C + 273.15))

T2 = 155.3 K = -118.8°C

Therefore, the melting point of mercury at 10 bar is -118.8°C.

(b) For P2 = 3540 bar:

T2 = (9.75 J/g / (8.314 J/(mol*K))) * (ln(3540 bar/1 bar) / (-1 / ( -38.87°C + 273.15))) + (1 / (-38.87°C + 273.15))

T2 = 223.6 K = -49.5°C

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Related Questions

El oxígeno y el azufre reaccionan con el cobre para formar óxido de cobre (CuO) y sulfuro de cobre (CuS), respectivamente. ¿Qué cantidad de azufre reacciona con el oxígeno? 1° Cu + O2 =2CuO 2° Cu + S = CuS 3° S + O2 = 2SO

Answers

Yes it need to be like that cause when it like that it like that

The given reaction is an example of displacement reaction. Here, one mole of oxygen reacts with one mole of oxygen molecules. Hence theoretically 32 g of sulphur needs 32 g of oxygen.

What is displacement reaction?

Displacement reactions are a kind of reactions where one element or group is displaced with other element or group. There are both single displacement and double displacement reaction.

The reaction of sulfur oxide with metallic copper producing copper oxide and copper sulphide is an example of single displacement reaction. The prior reaction for this is the combination of sulfur and oxygen.

Here, one mole of oxygen reacts with one mole of oxygen molecules. Hence theoretically 32 g of sulphur needs 32 g of oxygen. Thus each is reacting in 1 :1 ratio and giving the oxide of sulfur.

To find more on displacement reaction, refer here:

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The English translation of your question is as follows:

Oxygen and sulfur react with copper to form copper oxide (CuO) and copper sulfide (CuS), respectively. How much sulfur reacts with oxygen? 1° Cu + O2 =2CuO 2° Cu + S = CuS 3° S + O2 = 2SO

Find the amount of water containing 14.02 * 10²⁴ molecules​

Answers

Answer:

14.02 x 10²⁴ molecules

Explanation:

To solve this problem we will use Avogadro's number: It relates to the number of molecules (or atoms) contained in 1 mol of any given substance:

14.02 x 10²⁴ molecules ÷ 6.023 x 10²³ molecules/mol = 23.28 moles

Thus, 23.28 moles of water contain 14.02 x 10²⁴ molecules.

industrial gases cause acid rain why​

Answers

because the industrial gas is very harmful for us it is made up chemical and toxic gases

Answer:

The usual culprit is burning coal.

Explanation:

This produces a lot of carbon dioxide as well as sulphur dioxide. Other industrial processes, and vehicle emissions, produce similar oxides unless they are 'scrubbed' out. They react with atmospheric moisture to produce acids like carbonic, sulphurous and nitrous acids. Which is then precipitated. It should be remembered that a volcanic eruption has this effect too.

Which of the following is a property of a non-metal.

luster
ductile
malleable
does not conduct heat and electricity

Answers

Answer:

luster

:/:/:/:/:::/:::

The name for a mixture in which all samples are made up of the same
proportions of matter is:

Answers

Answer: homogeneous mixture

Explanation:

A quanta of electromagnetic energy is called *

Answers

Answer: A quantum of electromagnetic energy is called a photon. Also, do you mean a quantum because I don't think a quanta is a thing

Explanation:

What is the freezing point of a solution of 498mL of water (solute) dissolved in 2.50 L of ethanol (solvent), C2H5OH? The density of C2H5OH is 0.789g/cm3. (Remember that water has a density of 1.0 g/cm3.)

Answers

Answer:

Freezing T° of solution is -142.4°C

Explanation:

This excersise is about colligative properties, in this case freezing point depression,

ΔT = Kf . m . i

Where ΔT = Freezing T° of solvent - Freezing T° of solution

Kf = Cryoscopic constant

m = mol/kg (molality)

i = Number of ions dissolved.

Water is not ionic, so i = 1

Let's find out m.

We determine mass of water, by density

498ml . 1 g/mL = 498 g

We convert the mass of water to moles → 498 g . 1mol/18g = 27.6 moles

We determine mass of solvent by density

2500 mL . 0.789 g/mL = 1972.5 g

Notice, we had to convert L to mL to cancel units.

1 cm³ = 1 mL

We convert the mass from g to kg → 1972.5 g . 1kg /1000g = 1.97kg

We determine m = mol/kg → 27.6mol / 1.97kg = 13.9 m

Kf for ethanol is: 1.99 °C/m

Freezing T° for ethanol is: -114.6°C

We replace at formula: - 114.6°C - Freezing T° solution = 1.99 °C/m . 13.9 m . 1

- 114.6°C - Freezing T° solution = 27.8 °C

- Freezing T° solution  = 27.8°C + 114.6°C

Freezing T° Solution = - 142.4 °C

1 pt
Vanadium (V) is element 23 on the periodic table. A sample contains 2.88x1022 atoms of V. Calculate the amount of V.
1 pt
x mol V
1 pt
Resubmit
Show Approach Hide Tutor Steps

Answers

Ghbghvdezagnlmhhbbb

H3PO4 + HCI
PCI5+H2O

Answers

Answer:

Balanced Chemical Equation:

H3PO4 + 5HCl → PCl5 + 4H2O

The equation below represents the process that you observed. Balance the equation. What type of reaction?
6CO2 + 6H2O + light energy = 0C6H12O6 + 6O2 _______________________

Answers

Answer:

Explanation:

6CO2 + 6H2O = 0C6H12O6 + 6O2

First you note how much u got of everything in front of and behind the arrow

C   6                        C 6

O   6 + 12 = 18        O 6 + 12 = 18

H   12                       H 12

As you can see, the equation is already balanced.

This is the equation of photosynthesis, which is a chemical reaction

Which statement about copper, diamond, and silicon(IV) dioxide is correcta)Copper and silicon(IV) dioxide have similar electrical conductivityb)In diamond the carbon atoms are covalently bonded as flat sheetsc)In silicon(IV)dioxide the silicon and oxygen atoms are covalently bonded in flat sheetsd)The structure of copper includes a lattice of positive ions

Answers

Answer:

In diamond the carbon atoms are covalently bonded as flat sheets

In silicon(IV) dioxide the silicon and oxygen atoms are covalently bonded in flat sheets

The structure of copper includes a lattice of positive ions

Explanation:

Diamond and silicon(IV) dioxide are covalent network solids. Covalent network solids are made up of atoms joined to one another by covalent bonds to form a giant lattice, The solids are hard and have a very high melting point. They do not conduct electricity. So, for both diamond and SiO2, atoms are covalently bonded to yield flat sheets in a covalent bonded network solid.

Copper is a metallic substance having metallic bonds, a metallic crystal consists of positive ions and a cloud of electrons.

Which of the following may be a reason why climbing up objects would help the ivy survive?

Answers

I need the answers to help, but it will probably be something along the lines of climbing objects for sunlight.

Can someone help me with my stoichiometry homework, it is due tonight.

Answers

Answer:

1. 1 mole of NaCl.

2. 1 mole of H₂O.

Explanation:

The balanced equation for the reaction is given below:

HCl + NaOH —> NaCl + H₂O

From the balanced equation above,

1 mole of HCl reacted with 1 mole of NaOH to produce 1 mole of NaCl and 1 mole of H₂O.

Next, we shall determine the limiting reactant. This can be obtained as follow:

From the balanced equation above, we can see that 1 mole of HCl reacted completely with 1 mole of NaOH. Therefore, HCl is the limiting reactant and NaOH is the excess reactant since we have 3.6 moles of NaOH.

1. Determination of the amount of NaCl produced from the reaction.

NOTE: The limiting reactant is used to determine the maximum amount produced since all of it is consumed in the reaction.

The limiting reactant is HCl and the amount of NaCl produced can be obtained as follow:

From the balanced equation above, we can see that 1 mole of HCl reacted to 1 mole of NaCl.

Thus, 1 mole of NaCl was produced.

2. Determination of the amount of H₂O produced from the reaction.

From the balanced equation above, it is evident that 1 mole of HCl reacted to produce 1 mole of H₂O.

Thus, 1 mole of H₂O was produced.

Which phrases describe the oceans? Check all that apply.

cover more than 70 percent of Earth
provide oxygen for life on Earth
contain fresh water
constantly in motion
interact with other Earth systemsWhich was found to be unconstitutional based on the Supreme Court’s ruling in Scott v. Sandford?

Answers

Answer:

the first one is the answer

Answer:

Phrases that describe the oceans are

cover more than 70 percent of Earth

constantly in motion

interact with other Earth systems

Explanation:

What are the two most important properties of ocean water?

Two of the most important characteristics of ocean water are its temperature and salinity.

biology and physics are so closely related that sometimes the fields overlap. what experiment might both biologist and physicists do

Answers

Answer:

Study how the body's nerve cells react to an electrical shock.

Explanation:

Answer:

Study how the body's nerve cells react to an electrical shock.

Explanation:

a p ec

the stimulus is related to?​

Answers

Answer:

The government :) lol

Explanation:

Choose the formula for calculating percent composition.

Answers

Answer:

The equation for percent composition is (mass of element/molecular mass) x 100.

please mark me as a brainlist

What is the difference between an empirical formula and a molecular formula?

Answers

Answer:

The empirical formula simply states the ratios of the elements that make up the molecule, while molecular formulas specify the amounts of each element exactly, not just giving the ratio. Let's take ethane (C2H6) as an example.

3 By referring to subatomic particles, explain why
an atom of
nitrogen is electrically neutral.

Answers

Answer:

Explained below

Explanation:

Atoms are said to be electrically neutral when they have the same number of protons and electrons.

Now, Nitrogen atom has a mass number of 14 and an atomic number of 7. This means that it has 7 number of protons and 7 number of electrons.

From the definition of electrically neutral atoms, it's clear that nitrogen falls into that category.

Mammals and plants do not belong in the same domain.

Fact:

Evidence:

Answers

False

Fact: Mammals and plants belong to the same domain, the Eukarya domain.

Evidence :All the organisms that possess a eukaryotic cell, plants, animals, protists, and fungi are in the Eukarya domain.

I need help with this question ASAP

Answers

Answer:

I think its A)

Explanation: im not sure im sorry

Why do you think males and children are more likely to die from DHMO

Answers

Answer:

Dihydrogen Monoxide (DHMO) is perhaps the single most prevalent of all chemicals that can be dangerous to human life. Despite this truth, most people are not unduly concerned about the dangers of Dihydrogen Monoxide. Governments, civic leaders, corporations, military organizations, and citizens in every walk of life seem to either be ignorant of or shrug off the truth about Dihydrogen Monoxide as not being applicable to them. In 1997, the Dihydrogen Monoxide Research Division was formed and went online spreading the truth about DIHYDROGEN MONOXIDE. As word has spread, so too has the public awareness of Dihydrogen Monoxide and its implications involving the Internet and accessibility of such information. To that end, the DMRD's web site at DHMO.org continues to provide the most comprehensive collection of Dihydrogen Monoxide information available anywhere.

Explanation:

DHMO has been the dihydrogen monoxide. It has been responsible for the death of males and children as it causes tissue damage.

The DHMO has been the hydric acid and is one of the major constituents of acid rain. Gas has been responsible for greenhouse gas. Ingestion may lead to tissue damage with symptoms of nausea, vomiting, and electrolyte imbalance.

The companies dumping waste in the rivers and lakes have been warned for the removal of DHMO as it has been harmful to the males and children, and results in death.

For more information about Dihydrogen Monoxide, refer to the link:

https://brainly.com/question/14898986

20 POINTS!!
__________ aid the immune system in mounting attacks against cancer cells by targeting antigens only found on the surface of cancer cells.

A. Monoclonal antibodies
B. Interferons
C. CRISPR
D. Vaccines
E. Interleukins

Answers

Answer:

B. Interferon

Explanation:

interferon targets any lingering melanoma cells and prevents them from spreading and growing.

PLS HELP 6TH GRADE ITS ONE QUESTION ABOUT SCIENCE

Answers

Answer: The answer is C

Explanation:

Your answer would be C. :)

Why are the elements in group VIIIA unreactive?

They are all gases.

They have an even number of electrons in their outer shell.

They have a full outer shell of electrons.

They each have a stable nucleus.

Answers

Number 1/letter A is the answer to your asked question!

which statement best explains why chlorine is added to drinking water? A. Chlorine cures infections caused by bacteria or other microorganisms B. Chlorine protects people teeth against cavities C. Chlorine prepares the body to fight future infections D. Chlorine kills most pathogens in water

Answers

Answer:

to protect peoples teeth against cavities

Explanation:

i just know

Answer: its D

Explanation: A.P.E.X.

Which type of cell is associated with the statements below? Fill in the blank with either (voltaic cell, electrolytic cell, both).
Non-spontaneous reaction occurs:
Spontaneous reaction occurs:
Oxidation occurs at anode:
Electrolyte supports electron flow:

Answers

Answer:

Non-spontaneous reaction occurs: electrolytic cell.

Spontaneous reaction occurs: voltaic cell

Oxidation occurs at anode: both

Electrolyte supports electron flow: both

Explanation:

1s2, 2s2, 2p6, 3s2, 3p6, 4s2
How many shells does this atom have?

Answers

Answer:

4

Explanation:

What is the difference between fumarate and fumaric acid?

Answers

Answer:

the difference is fumaric acid the carboxylic acid groups are trans (E) and in maleic acid they are cis (Z)

Explanation:

and  Fumarate is an intermediate in the citric acid cycle used by cells to produce energy in the form of adenosine triphosphate (ATP) from food

PLEASE HELP ME !!!!

The octet rule states that atoms tend to form bonds so that each atom has eight ________ in its _______
shell

Answers

Answer:

electrons..............

Answer:

electrons, outer

Explanation:

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