compute the mass-specific enthalpy change associated with Nz that is undergoing a change in state from 400 k to 800 k

Answers

Answer 1

Answer:

The correct answer is "430 kJ/kg". A further explanation is given below.

Explanation:

The given values are:

T₁ = 400 k

T₂ = 800 k

The average temperature will be:

= [tex]\frac{T_1+T_2}{2}[/tex]

= [tex]\frac{400+800}{2}[/tex]

= [tex]600 \ k[/tex]

From table,

At 600 k the [tex]C p[/tex] will be = 1.075

Now,

⇒ The specific enthalpy = [tex]Cp(T_2-T_1)[/tex]

⇒                                [tex]\Delta h=1.075 (800-700)[/tex]

⇒                                      [tex]=430 \ kJ/kg[/tex]


Related Questions

[24 points] A sample of soil has a total volume of 205 cm3. The soil mass when saturated is 361 g. A specific yield test was conducted on the soil by allowing the sample to drain for 24 hours. After drainage the sample mass was 295 g. The soil was then dried and weighed 284 g. What are the specific yield [8 points], specific retention [8 points], and porosity [8 points] of the sample

Answers

Answer:

Follows are the solution to the given question:

Explanation:

Dry Soil weight = solid soil weight = [tex]284 \ grams[/tex]

solid soil volume =[tex]205 \ cc[/tex]

saturated mass soil = [tex]361 \ g[/tex]

The weight of the soil after drainage is =[tex]295 \ g[/tex]

Water weight for soil saturation = [tex](361-284) = 77 \ g[/tex]

Water volume required for soil saturation =[tex]\frac{77}{1} = 77 \ cc[/tex]

Sample volume of water: [tex]= \frac{\text{water density}}{\text{water density input}}[/tex]

[tex]= 361- 295 \\\\ = 66 \ cc[/tex]

Soil water retained volume = (draining field weight - dry soil weight)

                                             [tex]= 295 - 284 \\\\ = 11 \ cc.[/tex]

[tex]\text{POROSITY}= \frac{\text{Vehicle volume}}{\text{total volume Soil}}[/tex]

                    [tex]= \frac{77}{(205 + 77)} \\\\= \frac{77}{(282)} \\\\ = 27.30 \%[/tex]

(Its saturated water volume is equal to the volume of voids)

[tex]\text{YIELD SPECIFIC} = \frac{\text{Soil water volume}}{\text{Soil volume total}}[/tex]

                              [tex]= \frac{66}{(205+77)}\\\\= \frac{66}{(282)}\\\\=0.2340\\\\ = 0.23[/tex]

[tex]\text{Specific Retention}= \frac{\text{Volume of soil water}}{\text{Total soil volume}}[/tex]

                            [tex]= \frac{11}{282} \\\\= 0.0390 \\\\ = 0.04[/tex]

Which of these is smallest?
cells
atoms
matter
elements

Answers

Answer:

atoms

Explanation:

i hope that help you

Answer:

atoms

Explanation:

what do you think will happen if there is no coal.

Answers

Answer:

If coal and petroleum will get exhausted it will be very difficult for us to transport because most vehicles depends on petroleum, Transport on Earth will became complicated, and if coal will get exhausted we will lose an unique fossil fuel. Coal is used in various domestic and industrial purposes.

Fresh milk has a pH of 6.
How do you think the pH
would change as it became
sour? Explain your answer.

Answers

Yes it would because the ph has changed when the particles in the milk started to turn sour

What does "X" represent in the following symbol?
80
Х
35

Answers

Answer:bromine

Explanation:

1. What is the molar mass of Al2S3?

Answers

Answer:

150.17 g/mol

Explanation:

The night sky is filled with images of wild animals. Which animal is the circled constellation named after?

scorpion
serpent
snake
salamander

A group of stars connected by lines is circled and labeled Saturn.

Answers

Answer:

ccc

Explanation:

Answer:

A

Explanation:

trust

How many moles are in 3.30 x 1024 molecules of N2I6

Answers

Divide the number of molecules N by avogadro's constant.

Let n be the number of moles then,

[tex]n=\frac{N}{N_A}=\frac{3.3\cdot10^{24}}{6.022\cdot10^{23}}=5.48\mathrm{mol}[/tex]

Hope this helps.

what happens when hydrogen gas is passed over hot ferric oxide plzz help ​

Answers

When hydrogen is passed over hot ferric oxide (FeO) hydrogen reacts with oxygen present in the compound and forms water (H2O) and pure Iron

Question 12 (1 point)
You notice light pollution in
a.space
b.big cities
c.rural areas
d.our galaxy

Answers

Answer:

the answer is D . our galaxy

Answer:

our galaxy of course

Help pls!!!!!!!!!!!!!!!!!!!!!!!!!!

Answers

Oxygen
I think
Hope this helps

Answer:

water/d

Explanation:

HURRY PLEASE
If 12 grams of sodium reacts with 16 grams of chlorine, how much sodium chloride is Formed?
A. 4 g
B. 12 g
C. 28 g
D. 30 g

Answers

Answer:

6.576 g NaCl

Explanation:

2Na + Cl2 --> 2 NaCl

Step 1: Find out moles of Na and Cl to determine the limiting reactant:

moles Na = 12/23 = 0.52 moles Na

moles Cl2 = 16/71=0.225 moles Cl2

ratio Na:Cl is 2.3:1 so Cl is the limiting reactant.

Step 2: How many moles of NaCl are formed:

moles NaCl = moles Cl2 x (1 mol NaCl/2 moles Cl2) = 0.225/2 = 0.1125 moles NaCl

Step 3:

mass NaCl = moles NaCl x MM NaCl = 0.1125 x 58.45 = 6.576 g NaCl

Which of the following observations about burning sugar provides evidence of a
chemical reaction?
a. Heat is added to the sugar crystals.
b. The sugar melts and becomes a liquid.
с
C. The temperature of the sugar increases.
d. Gas is produced as the sugar turns black.
1 Pt
А
B
D

Answers

B the best way for me and I don’t know what to say about that but you don’t

What type of chemical reaction is this? CH4 + O2 + CO2 + H20 ?

Answers

Answer:

combustion reaction. hope this helps!

Which of the following are made possible by energy transfer from the Sun? Choose all that apply.
A. biofuels
B. nuclear power using uranium
C. wind power
D. hydroelectric power using a dam

This is Really Science but I couldn’t find it but please help ASAP!

Answers

The answers must be B or D

Will give brainliest to correct answer of this picture:

Answers

Answer:

option C : cellular respiration

Explanation:

cellular respiration is taking place in this diagram .

as in respiration food get oxidised to release energy and it releases CO2 and water

g) How many grams of aluminum (Al) are present in 2.98 mol of Al?


h) How many moles of Br are there if the sample contained 5.6 x 1024 atoms of Br?

Answers

Answer:

26.982 g

i think so..........

Draw the structure of the peptide DTLH, showing the backbone and side-chain atoms, at its isoelectric point. Draw the molecule on the canvas by choosing buttons from the Tools (for bonds and charges), Atoms, and Templates toolbars. Draw peptide molecule as zwitter ion.

Answers

Answer:

Explanation:

A peptide is any class of organic compounds composed of different numbers of amino acids in which the amine of one is reacted with the carboxylic acid of the next to form an amine bond. The peptide of DTLH is composed of the following amino acids:

Asp-Thr-Leu-His

Their structures are first drawn out in the image attached below. This is followed by the isoelectric structure of the peptide DTLH

Don’t skip please!!! I need help

Answers

Further explanation

Given

Atomic symbol

Required

Atomic composition

Solution

Atomic number = number of protons = number of electrons

Mass Number (A) is the sum of protons and neutrons

Number of protons and Number of Neutrons  in nucleus

Number of electrons in the shell

From the picture:

protons = 3

neutrons = 4

electrons = 3

atomic number = protons = electrons = 3

mass number = protons + neutrons = 3+4 = 7

The Water Cycle: Lesson
Mckenze Jelks
Which example best shows how the water cycle carries on energy transfer?
Choose the correct answer.
O a flooding river depositing silt on a floodplain
O a warm ocean current warming the air above it
O ocean water depositing sand particles on a shore
O water seeping through the soil and dissolving salts

Answers

option 2, a warm ocean current warming the air above it.

If you had the same stock of the blue solution as in the serial dilution simulation you did (1M solution), and you needed 10 mL of a solution that was 1.0x10-6 M, what volume of the blue stock solution would you need, and what volume of diluent would you need to reach 10 mL of the desired concentration

Answers

Answer: We start by doing a 1/10 serial dilution, using 100 µL of 1M solution into 900 µL of water, until we get a 1.0x10^-5M (0.00001M) solution. Then use 1 mL of this 1.0x10^-5M solution into 9 mL of water.

Explanation:

To answer this question, we must use the law of conservation of mass, which states: In every chemical reaction mass is conserved, this means the total mass of the reactants is equal to the total mass of the products. The law implies that mass can neither be created nor destroyed, but it can be transformed. For example, in chemical reactions, the mass of the chemical components before the reaction is equal to the mass of the components after the reaction. Therefore, during any chemical reaction and low-energy thermodynamic processes in an isolated system, the total mass of the reactants or starting materials must be equal to the mass of the products. This law is quite accurate for low-energy processes, such as chemical reactions.

So, if the solution to be used is 1M , and a 10 mL of a 1.0x10^-6M solution is needed, we use the following equation:

Initial concentration x initial volume = final concentration x final volume.

The initial concentration is 1M, the final concentration is 1.0x10^-6M and the final volume required is 10 mL.

1M x initial volume = 1.0x10^-6M x 10 mL

initial volume=  1.0x10^-5 mL= 0.01 µL of 1M solution.

Since the final volume is 10 mL, we have to add the difference in volume with water, which is 10 mL - 1.0x10^-5 mL= 9.99999 mL.

However, since 0.01 mL is a very small volume that is difficult to take, the best option in this case is to make serial dilutions.

Usually, we start from a concentrated solution and prepare a series of dilutions to the tenth (1:10) or half (1:2). In this way a series of solutions is obtained, related for example by a dilution factor of 10, i.e. 1/10; 1/100; 1/1000 and so on.

Here we can prepare a series of dilutions to the tenth, from 1M to 1.0x10^-6.

We start by doing a 1/10 dilution, using 100 µL of 1M solution into 900 µL of water. This is a 0.1M solution. Then we take 100 µL of it into 900 µL of water to get a 0.01M solution. We continue doing that until we get a 1.0x10^-6M (0.000001M) solution. This final solution is the desired concentration, however we need 10 mL of it, and actually we have 1 mL. So we can just take 1 mL of the 1.0x10^-5M solution into 9 mL of water:

1.0x10^-5M x 1 mL = 1.0x10^-6M x 10 mL.

Two units of distance used by scientists to describe distances in space are the light-year and astronomical unit. Why do scientists use the light-year instead of Astronomical Units to measure the distances between stars?
The speed of sound is too slow.
Telescopes can measure only in light years
Distant stars can only be seen if there is light
The smaller numbers that result from measuring with larger units are easier to use

Answers

Answer:

The smaller numbers that result from measuring with larger units are easier to use .

That’s the one, good luck!

The smaller numbers that result from measuring with larger units are easier to use.

Light year is a unit of astronomical distance that measures the distance traveled by light in one year. The distance between stars can also be measured using parsecs.

The equivalent of this distance in various units is written as follows;

1 light year (ly) = 9.5 x 10¹² km = 63,240 AU1 parsec = 3.26 ly

Using light year to represent the unit of distance is more concise because big measurement can be represented easily with small numbers using this large unit.

Thus, we can conclude that the smaller numbers that result from measuring with larger units are easier to use.

Learn more here:https://brainly.com/question/803764

How many atoms are found in a 15.5 g sample of bismuth?

Answers

Answer:

The number of particles in the 41.8g sample of Bismuth is 12.044 × 10²³

Explanation:

In a 15.5 g sample of bismuth there are 4.47 x 10²² atoms are present.

What do you mean by the term molar mass ?

The term molar mass is defined as the ratio between the mass and the amount of substance of any sample of said compound. The molar mass is a property of a substance.

The molar mass of a compound can be calculated by adding the standard atomic masses in g/mol of the constituent atoms.

Given:

Mass of Bismuth  = 15.5g

Number of atoms  = ?

To find the number atoms, find the number of moles in this element first.

Number of moles  = mass/ molar mass

Number of moles  =  15.5g / 209    

= 0.074mole

1 mole of a substance contains 6.023 x 10²³ atoms

0.074 mole of Bismuth will contain 0.074 x 6.023 x 10²³ atoms

= 4.47 x 10²² atoms

Thus, 4.47 x 10²² atoms are found in a 15.5 g sample of bismuth.

To learn more about the molar mass, follow the link;

https://brainly.com/question/22997914

#SPJ6

what is the difference between fluorine and oxygen?

Answers

Answer:

Continuing on across the periodic table we see that fluorine is the next element after oxygen. ... Rather than forming seven bonds fluorine only forms a single bond for basically the same reasons that oxygen only forms two bonds. Hydrogen fluoride, HF, has one bond, but four centers of electron density around the fluorine.

One way to represent this equilibrium is: 2 Al(s) 3 Br2(l)2 AlBr3(s) We could also write this reaction three other ways, listed below. The equilibrium constants for all of the reactions are related. Write the equilibrium constant for each new reaction in terms of K, the equilibrium constant for the reaction above.

Answers

The question is incomplete, the complete question is;

Aluminum metal and bromine liquid (red) react violently to make aluminum bromide (white powder). One way to represent this equilibrium is:

Al(s) + 3/2 Br2(l)AlBr3(s)

We could also write this reaction three other ways, listed below. The equilibrium constants for all of the reactions are related. Write the equilibrium constant for each new reaction in terms of K, the equilibrium constant for the reaction above.

1) 2 AlBr3(s) 2 Al(s) + 3 Br2(l)

2) 2 Al(s) + 3 Br2(l) 2 AlBr3(s)

3) AlBr3(s) Al(s) + 3/2 Br2(l)

Answer:

See explanation

Explanation:  

We have that; Al(s) + 3/2 Br2(l)AlBr3(s)

So;

Al(s) + 3/2 Br₂(l) = AlBr₃(s)

K = [  AlBr₃] / [ Al] [  Br₂]³/²

K² =  [  AlBr₃]² / [  Al ] ² [ Br₂]³

Now;

1) 2 AlBr₃ = 2 Al(s) + 3 Br₂(l) =

K₁ =  [  Al ] ² [ Br₂]³ /  [  AlBr₃]²

K₁ =  ( 1 / K² ) = K⁻²

For the second reaction;

2 ) 2 Al(s) + 3 Br₂(l) = 2 AlBr₃(s)

K₂ = [ AlBr₃ ]² / [  Al ]² [  Br₂ ]³

K₂ = K²

For the third reaction;

3 )

AlBr₃(s) =   Al(s) + 3/2 Br₂(l)

K₃  = [ Al ] [ Br₂ ] ³/² / [ AlBr₃ ]

=  ( 1 / K ) = K⁻¹

Please help asap! Giving brainliest to correct answer.

Three sections of the periodic table are labeled A, B, and C in the image below.

Which of the following statements is most likely true for an element present in section B?
Select one:

a. It is a highly reactive metal.

b. It is an inert gas at room temperature.

c. It may act as an insulator or a conductor.

d. It is a highly reactive liquid at room temperature.

Answers

Answer:

C. It may act as an insulator or a conductor.

Explanation:

Group B are the metalloids, so they have properties of both metals and nonmetals.

The statement which is most likely true for an element present in section B is: C. It may act as an insulator or a conductor.

A periodic table can be defined as an organized tabular array of all the chemical elements, which is typically arranged in order of increasing atomic number or number of protons (in rows).

In this diagram, the chemical element that is present in section B of the periodic table is a metalloid.

A metalloid can be defined as a chemical element that are typically intermediate between those of semiconductors, non-metals and metals.

Thus, a metalloid has both chemical and physical properties that are a combination of metals and non-metals or semiconductors.

In this context, the statement which is most likely true for an element present in section B is that it may act as an insulator or a conductor because it is a metalloid.

Read more: https://brainly.com/question/17482288

Determine the mass (in g) of a substance, with a density of 2.26 g/mL, that occupies 350.0 mL.

Answers

Answer:

m = 79.1 grams

Explanation:

Given that,

Density, d = 2.26 g/mL

Volume occupies, V = 35 mL

We need to find the mass of the substance. We know that the density of an object is equal to the mass per unit volume. So,

d = m/V

[tex]m=d\times V\\\\m=2.26\ g/mL\times 35\ mL\\\\m=79.1\ g[/tex]

So, the mass of the substance is 79.1 grams.

nitrogen atom in NH3 has ___ shared electrons ​

Answers

Answer:

3

Explanation:

nitrogen atom in NH3 has 3 shared electrons.

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