The heat of vaporization of diethyl ether is . Calculate the change in entropy when of diethyl ether boils at . Be sure your answer contains a unit symbol. Round your answer to significant digits.

Answers

Answer 1

Answer:

[tex]\Delta S=900\frac{J}{K}[/tex]

Explanation:

Hello!

In this case, since the information is not missing, the following one will be used as it is found on similar problems:

[tex]\Delta h=26.7kJ/mol\\T_b=34.6\°C\\m=769.0g[/tex]

In such a way, we use the following equation to compute the entropy:

[tex]\Delta S=\frac{n\Delta h}{T_b}[/tex]

Whereas n (moles) are computed by using its molar mass (74.14 g/mol) as follows:

[tex]n=769.0g*\frac{1mol}{74.14g}=10.4mol[/tex]

[tex]\Delta S=\frac{10.4mol*26.7\frac{kJ}{ml} }{(34.6+273.15)K}\\\\\Delta S=0.900 \frac{kJ}{K} \\\\\Delta S=900\frac{J}{K}[/tex]

Best regards!


Related Questions

4. For the reaction A + 2B → C, the rate law is
Δ[C]/ΔT = k[A]²[B]
What are the units of the rate constant where time is measured in seconds?
a. 1/ M · s
b. 1/ M² · s
c. 1/ s
d. M²/ s
e. M/ s

Answers

The rate constant : b. 1/ M² · s

Further explanation  

The reaction rate (v) shows the change in the concentration of the substance (changes in addition to concentrations for reaction products or changes in concentration reduction for reactants) per unit time.  

For A + B  ---> C + D

Can be formulated:

[tex]\large{\boxed{\boxed{\bold{v~=~k.[A]^a[B]^b}}}[/tex]

where

v = reaction speed, M / s

k = constant, mol¹⁻⁽ᵃ⁺ᵇ⁾. L⁽ᵃ⁺ᵇ⁾⁻¹. S⁻¹

a = reaction order to A

b = reaction order to B

[A] = [B] = concentration of substances

Units of the rate constant - k depend on rate law, so it is unique for the specific reaction

So for the rate law :

Δ[C]/ΔT = k[A]²[B] , the units are :

[tex]\tt \dfrac{M}{s}=k\times M^2\times M\\\\k=\dfrac{M/s}{M^2\times M}\\\\k=\dfrac{1}{M^2.s}[/tex]

What is the definition of electron configuration. and thanks

Answers

Answer:

In atomic physics and quantum chemistry, the electron configuration is the distribution of electrons of an atom or molecule in atomic or molecular orbitals. For example, the electron configuration of the neon atom is 1s² 2s² 2p⁶, using the notation explained below

Explanation: welcome

Andesitic rock is an igneous rock with a composition in between that of basaltic and granitic igneous rock.

true or false

Answers

Answer:

Explanation:

intristing

Webb is testing samples of different elements. One sample is a dull, yellow solid that
breaks into powdery pieces when he hits it with a hammer. How should Webb classify
the yellow solid?
As a metal
As a nonmetal
As a gas
As a metalloid

Answers

Answer: it's nonmetal

Explanation: Sulfur has characteristics of nonmetals. It does not have luster, it cannot conduct electricity, and it is brittle. On the periodic table, sulfur is in group 16/VIA, in the third period. The group is called the oxygen group or the chalcogens.

Answer:

i dont know

Explanation:

Which is associated with low humidity? *

dry air
warm air
rainforest
coastal area

Answers

Answer:

A: dry air

Explanation:

Trust me this is right, I’m doing the exam rn and if its not right I will come back and edit this.

Answer:

guy above me is right

Explanation:

100% on quiz

You have 0.672 L of 4.78 M aqueous AlCl3 solution in a glass. If you gently heat the solution until only 0.380 L is left, what is the new molarity of the AlCl3 solution?

Answers

Answer:

8.45 M

Explanation:

To solve this problem we need to keep in mind the definition of molarity:

Molarity = moles / volume

First we calculate the moles of AlCl₃ in 0.672 L of a 4.78 M solution:

Moles = Molarity * volumeMoles = 4.78 M * 0.672 L Moles = 3.212 moles

Then we calculate the new molarity of the AlCl₃ solution using that number of moles, which remains the same throughout the evaporation process:

New Molarity = 3.212 moles / 0.380 LNew Molarity = 8.45 M

To everyone who has exams today, I WISH YALL THE BEST OF LUCK!!!!

Answers

THANK YOU SO MUCH

I HATE EXAMS

ありがとう私は本当にこの励ましが必要でした :)

The cell membrane around a cell forms a barrier that protects and regulates the cell. Certain chemicals can pass through the plasma membrane because they have similar chemical properties as the membrane.

Which best describes those that can pass through?

They are concentrated.
They are soluble.
They are diluted.
They are heated.

Answers

Answer:

it is b (they are soluble)

Explanation:

got it right on edg and on quizlet

Answer:

B. They are soluble

Explanation:

21.4 L of gas at 42.3 °C and 681 mm Hg are heated to 221 °C, and the pressure is changed to 248 mm Hg. What is the new volume?

Answers

Answer:

V₂ = 90.42 L

Explanation:

Given data:

Initial volume = 21.4 L

Initial pressure = 681 mmHg (681/760=0.89 atm)

Initial temperature = 42.3 °C (42.3 +273 = 315.3 K)

Final temperature = 221°C (221+273 = 494 K)

Final volume = ?

Final pressure = 248 mmHg(248/760 =0.33 atm)

Formula:

P₁V₁/T₁ = P₂V₂/T₂  

P₁ = Initial pressure

V₁ = Initial volume

T₁ = Initial temperature

P₂ = Final pressure

V₂ = Final volume

T₂ = Final temperature

Solution:

P₁V₁/T₁ = P₂V₂/T₂  

V₂ = P₁V₁T₂/T₁P₂

V₂ = 0.89 atm × 21.4 L × 494 K / 315.3 K × 0.33 atm

V₂ = 9408.72 L /104.05

V₂ = 90.42 L

help me pleaseeeeee​

Answers

Answer:

Arthropod (3)

Annelids (2)

Cnidarians (1)

Echinoderms (4)

Explanations:

I hope all this helps if u don't understand it let me know.

Which of these organisms can move on its own?

A oak tree
B anteater
C dolphin
D all of the above

Answers

an anteater and a dolphin both move on their own, so i would choose D- all of the above. i had no idea that trees move on their own, but unless there’s an option to choose two of them, then i would choose D
C and B because a tree can’t move if you look outside the tree can’t move it sits there B because a ant eater walks to get its food and a dolphin uses it’s fins to move but also they have to travel in packs so if you can’t put to answers put B.

7. A. How many moles of Calcium hydroxide (CaOH2) are needed to completely react with 14.5 mol of Phosphoric acid (H3PO4)?

2 H3PO4 + 3 Ca(OH)2 → 6 H(OH) + Ca3(PO4)2

a. How many moles of water (HOH) will be produced?




b. How many moles of Calcium Phosphate (CaOH2) will be produced?

Answers

Answer:

moles of calcium hydroxide= 21.75 mol

a) 43.5 mol

b) 7.25 mol

Explanation:

Please see the attached picture for the full solution.

Which is a method that can be used to separate the components of a solution?
magnetic separation
decantation
filtration
distillation

Answers

Answer:

distillation

Explanation:

i did the assignment

Answer:

distillation

Explanation:

Which substances are componds

Answers

Answer:

Water - Formula: H2O = Hydrogen2 + Oxygen. ...

Hydrogen Peroxide - Formula: H2O2 = Hydrogen2 + Oxygen2 ...

Salt - Formula: NaCl = Sodium + Chlorine. ...

Baking Soda - Formula: NaHCO3 = Sodium + Hydrogen + Carbon + Oxygen3 .

Octane - Formula: C8H18 = Carbon8 + Hydrogen18

are 5 examples

Explanation:

True or False: The polar zones on Earth are near the equator

Answers

it is for sure sure false

Answer:

False they are on the extremes of the earth they are poles they are so cold the temp is freezing there and near the equator it would hot

whats the reason you can float a paperclip on water?

Answers

Answer:

because it is not a rock and it is not thick so it can float

Explanation:

because it is thin and light

Water has high surface tension and the paper clip has a much higher density

Two descriptions about physical quantities are given below:

Quantity A: It is a force.
Quantity B: It changes when the object travels from Earth to Earth's moon.

What quantities are these most likely describing?

Select one:
a. Both Quantity A and Quantity B are mass.
b. Both Quantity A and Quantity B are weight.
c. Quantity A is weight and Quantity B is mass.
d. Quantity A is mass and Quantity B is weight.

Answers

Answer:

[tex]\huge\boxed{\sf Option \ B}[/tex]

Explanation:

=> Weight is an attractive force which is exerted on any body.

=> It changes when the object's place changes as it depends upon the acceleration due to gravity ( g = 9.8 m/s ) which changes as we move from place to place.

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

Hope this helped!

~AnonymousHelper1807

Which of the following is an example of potential energy? O A. The energy of vibrating air O B. The energy of moving particles O C. The energy in chemical bonds OD. The energy of a runner on a flat road​

Answers

D

Explanation:

i hope so it is the answer

Which is one factor that scientists use to classify orders of soil?

Answers

Answer:

The scientist classify the types of soil based on the texture of the soil, the type of Rock from which they are formed and the type of organisms which live in the soil. For example red soil is formed by the weathering of reddish type of Rock which is found in that territory.

Explanation: google and me.....hope this helps

One factor which scientists used to classify orders of is Soil texture

Soil texture

Soil texture is a classification strategy that scientists used to determine soil classes orders based on their physical texture.

Soil texture and soil structure are unique properties of the soil that will have a great effect on the behavior of soils, such as water holding capacity, nutrient retention and supply, drainage, and nutrient leaching.

Learn more:

https://brainly.com/question/25761065

Which is a component of John Dalton’s atomic theory?
The ratio of atoms in a compound is fixed.
The atoms of different elements are the same.
An atom is a small particle of matter that can be broken down.
A reaction can create or destroy atoms as well as rearrange them.

Answers

THE ANSWER IS B THE ATOMS OF DIFFERENT ELEMENTS ARE THE SAME

Dalton hypothesized that the law of conservation of mass and the law of definite proportions could be explained using the idea of atoms. He proposed that all matter is made of tiny indivisible particles called atoms, which he imagined as "solid, massy, hard, impenetrable, movable particle

Answer:

i think the answer is b

Explanation:

8. What energy transformations take place in a simple electric motor?
D. light --> electrical
B. kinetic --> electric
A. chemical => solar
C. electrical -> kinetic​

Answers

Answer:

I don't know

Explanation:

just wanna talk because I am getting bored.

Answer:

B)

takes mechanical energy and makes it electrical

Explanation:

What mass of lithium phosphate (Li3PO4) is needed to prepare 500 mL (0.500 L) of a solution having a lithium ion concentration of 0.125 M?
a. 2.41 g
b. 6.75 g
c. 10.1 g
d. 19.3 g
e. 30.4 g

Answers

Answer:

a. 2.41 g

Explanation:

First we calculate the number of lithium ion moles (Li⁺) in the solution, multiplying the concentration times the volume:

500 mL ⇒ 500 / 1000 = 0.500 L

0.125 M * 0.500 L = 0.0625 mol Li⁺

Then we convert moles of Li⁺ to moles of Li₃PO₄, keeping in mind that for each mole of Li₃PO₄ there are 3 Li⁺ moles:

0.0625 mol Li⁺ * [tex]\frac{1molLi_3PO_4}{3molLi^{+}}[/tex]= 0.02083 mol Li₃PO₄

Finally we convert Li₃PO₄ moles to grams, using its molar mass:

0.02083 mol Li₃PO₄ * 115.79 g/mol = 2.41 g

The mass of lithium phosphate, Li₃PO₄ required to prepare the solution is 2.41 g

The correct answer to the question is Option A. 2.41 g

We'll begin by calculating the concentration of Li₃PO₄. This can be obtained as follow:

Li₃PO₄(aq) —> 3Li⁺(aq) + PO₄³¯(aq)

From the balanced equation above,

3 moles of Li⁺ is present in 1 mole of Li₃PO₄.

Therefore,

0.125 M Li⁺ will be present in = 0.125 / 3 = 0.0417 M Li₃PO₄.

Thus, the concentration of Li₃PO₄ is 0.0417 M

Next, we shall determine the number of mole of Li₃PO₄ in the solution.

Molarity of Li₃PO₄ = 0.0417 M

Volume = 0.5 L

Mole of Li₃PO₄ =?

Mole = Molarity x Volume

Mole of Li₃PO₄ = 0.0417 × 0.5

Mole of Li₃PO₄ = 0.02085 mole

Finally, we shall determine the mass of Li₃PO₄ required to prepare the solution.

Mole of Li₃PO₄ = 0.02085 mole

Molar mass of Li₃PO₄ = (3×7) + 31 + (16×4) = 116 g/mol

Mass of Li₃PO₄ =?

Mass = mole × molar mass

Mass of Li₃PO₄ = 0.02085 × 116

Mass of Li₃PO₄ = 2.41 g

Thus, the mass of Li₃PO₄ required to prepare the solution is 2.41 g

The correct answer to the question is Option A. 2.41 g

Learn more: https://brainly.com/question/3126258

Calculate the amount of heat, in Joules, needed to raise 34.0g of water from 55.0°C to 76.0*C. The specific heat of water is 4.18 J/gºC.

Answers

Answer:

2984.52J

Explanation:

Using the formula: Q = m × c × ∆T

Where;

Q = amount of heat (in Joules)

m = mass (in grams)

c = specific heat capacity (J/g°C)

∆T = change in temperature (°C)

Based on the information provided in the question;

m = 34.0g

c = 4.18 J/gºC.

Initial temperature = 55.0°C

Final temperature = 76.0°C

Hence, Q = m × c × ∆T

Q = 34 × 4.18 × (76 - 55)

Q = 142.12 × 21

Q = 2984.52J

Therefore, 2984.52J is the amount of heat, in Joules, needed to raise 34.0g of the water.

Which structure vibrates the hammer?

stirrup
ear canal
eardrum
anvil

Answers

ANSWER: Eardrum

EXPLANATION:

The vibrations from the eardrum set the ossicles into motion. The ossicles are actually tiny bones — the smallest in the human body. The three bones are named after their shapes: the malleus (hammer), incus (anvil) and stapes (stirrup). The ossicles further amplify the sound.

Answer:

Yes, the correct answer is C) Ear Canal

Explanation:

When is my dad going to get the milk?

Answers

Answer:

joe.......

Explanation:

mama......

10. Electromagnetic waves used to examine broken bones inside the body are called

Answers

The answer to your question are X-Rays.

We use this all the time when we have broken bones in our skeletal system!

Answer:

it would be x-rays

Explanation:

Heat energy always moves in which direction?
Group of answer choices

Large objects to small objects

Dark objects to light objects

Warm objects to cool objects

Smooth objects to rough objects

Answers

Answer:

large object to small objects

Answer:

The answer is C or warm objects to cool objects

Explanation:

Heat is the thermal energy flows from one substance to another when the substances differ in temperature. When you drink hot chocolate the heat from the liquid will flow to your mouth.

500 grams of an unknown substance gains 23000 J of heat as it is heated from a temperature of 250C to 1250C. Using mathematical computation and the chart below, determine the identity of the unknown substance.

Answers

Answer:

The given substance is cast iron.

Explanation:

Given data:

Mass of substance = 50 g

Heat absorbed = 23000 J

Initial temperature = 250°C

Final temperature = 1250°C

Which metal is this = ?

Solution:

Specific heat capacity:

It is the amount of heat required to raise the temperature of one gram of substance by one degree.

Formula:

Q = m.c. ΔT

Q = amount of heat absorbed or released

m = mass of given substance

c = specific heat capacity of substance

ΔT = change in temperature

ΔT = 1250°C -  250°C

ΔT = 1000°C

23000 j = 50 g ×c ×1000 °C

23000 J = 50,000 g. °C×c

c = 23000 J /50,000 g. °C

c = 0.46 J/g.°C

The given substance is cast iron.

500.0 liters of a gas are prepared at 700 mm Hg and 200 C. The gas is placed into a tank under high pressure. What is the volume of the gas?

Answers

Answer: 143*tank temperature/tank pressure L

Explanation: too few data. Need to know the pressure and what if any, temperature change.

tank volume = (tank temp/tank pressure)*(500*200/700) = 143*tank temp/tank pressure L

At constant temperature, (500*700)/tank temp

e.g. at 1400mm Hg, 500*700/1400 = 250L

Each of the structures for CIOCI, NCOH, and CINO has atoms connected in the order given in their formulas. Identify the type of hybridization for the central atom in each compound. Write the appropriate items to their respective bins.
a. nitrogen in CINO
b. oxygen in CIOCI
c. carbon in NCOH
1. sp
2 sp2
3. sp3

Answers

Answer:

see explanation

Explanation:

If we look at the structures of each of the compounds we can be able to deduce the accurate hybridization of each of the atoms listed.

Looking at ClNO - we can see that the nitrogen atom is linked to oxygen by a double bond and linked to chlorine by a single bond retaining a lone pair on nitrogen. Hence the nitrogen is in sp2 hybridized state.

For ClOCl, the compound has a sp3 hybridized oxygen atom linked to two chlorine atoms as expected retaining two lone pairs on oxygen.

For NCOH, the carbon atom is doubly bonded to oxygen hence it is sp2 hybridized.

Answer:

A) Label 2 (Sp2)

B) Label 3 (Sp3)

C) Label 1 (Sp)

Explanation:

A) Have 7 Lone Pairs (LP) to place. 1 on N. 1 becomes a double bond. Double bonds count as 1 Electron Group. Same for single bond and LP. Add these to get 3. 3 coresponds for SP2

B) 8LP. 2LP on O. 2 bonds to O. Add to get 4. 4-> Sp3

C) 5LP. C O bond is double. single bond to N. Add to get 2-> Sp

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