1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
GrogVix [38]
3 years ago
14

What is the boiling point of cyclohexane at 620 mmhg? can you show calculations?

Chemistry
2 answers:
Anton [14]3 years ago
7 0

 Boiling point of cyclohexane at 620 mm hg?  

Standard atmospheric pressure is 760 mm Hg. Boiling point at 760 mm= 80.74˚C  

A liquid boils when its vapor pressure is equal to the atmospheric pressure. The vapor pressure of a liquid is proportional the absolute temperature of the liquid.  

As the atmospheric pressure decreases, less vapor pressure is needed to cause the liquid to boil. Less vapor pressure means lower temperature.  

The boiling point of cyclohexane at 620 mm Hg is less than 80.74˚C



TRY THAT OR THIS

 

271.78

vitfil [10]3 years ago
7 0

Answer:

Boiling point of cyclohexane at 620 mm Hg is 440.6 K

Explanation:

According to clausius-clapeyron equation for a liquid-vapour equilibrium-

ln(\frac{P_{2}}{P_{1}})=\frac{-\Delta H_{vap}}{R}(\frac{1}{T_{2}}-\frac{1}{T_{1}})

where P_{2} and P_{1} are vapor pressure of liquid at T_{2} and T_{1} temperature respectively

\Delta H_{vap} is the molar enthalpy of vaporization of liquid

Let's assume \Delta H_{vap} is equal to standard molar enthalpy of vaporization of a liquid

For cyclohexane, standard molar enthalpy of vaporization is 32.83 kJ/mol

Here, P_{2} = 620 mm Hg, T_{1} is 450.8 K (boiling point of cyclohexane) and P_{1} is 760 mm Hg

So, ln(\frac{620mm Hg}{760mm Hg})=\frac{-32.83\times 10^{3}J/mol}{8.314 J/(mol.K)}\times (\frac{1}{T_{2}}-\frac{1}{450.8K})

So, T_{2}=440.6K

You might be interested in
___________tiny solid particles in interstellar space thought to consist of a core of rocklike material (silicates) or graphite
crimeas [40]

Answer:

Interstellar medium

Explanation:

The interstellar medium (ISM) is the matter and radiation that exists in the space between the star systems in a galaxy. This matter includes gas in ionic, atomic, and molecular form, as well as dust and cosmic rays.

5 0
3 years ago
A sugar crystal contains approximately 1.4×1017 sucrose (C12H22O11) molecules. What is its mass in milligrams? Express using 2 s
alekssr [168]

Answer:

From the periodic table:

mass of carbon = 12 grams

mass of hydrogen = 1 grams

mass of oxygen = 16 grams

molar mass of surcose = 12(12) + 22(1) + 11(16) = 342 grams

number of molecules = number of moles x Avogadro's number

number of moles = number of molecules / Avogadro's number

number of moles = (2.2x10^17) / (6.02x10^23) = 3.6544 x 10^-7 moles

number of moles = mass / molar mass

mass = number of moles x molar mass

= 1.7 x 10^17/6.022 x 10^23.

5 0
3 years ago
Read 2 more answers
Help pls again HAHAHAH
Alenkasestr [34]

<u><em>I believe the answer you are looking for is position 4 </em></u>, because the northern face of the hemisphere is facing away from the sun not getting

to much heat nor daylight therefore its cold making it winter fully in option 4.

Just a tip option 3 looks like its facing back but half of it is still shown to the sun.

5 0
3 years ago
5. A plane starting from rest is accelerated to its takeoff velocity of 75 m/s during a 5
LuckyWell [14K]

Answer:

answer is 14

Explanation:

A= v-u/t

A = 75 - 0/5

A = 14

v = final velocity

U = initial velocity

T = time taken

8 0
2 years ago
Why is hydrogen placed in group one of the<br> periodic table?
Mice21 [21]

Answer:

Hydrogen has only 1 valence electron in its outermost shell.

Explanation:

6 0
3 years ago
Other questions:
  • If the crust of the Earth is thin and can be ruptured, a ________ can form. A.landslide
    14·1 answer
  • Newton's Third Law: "For every action, there is an equal and opposite reaction." ... The forces are the result of
    15·1 answer
  • a 20ml sample of hcl was titrated with the 0.0220 M Naoh. to reach the endpoint required 23.72 mL of the NaOh. Calculate the mol
    11·1 answer
  • A reaction involves the parts of two compounds switching places to form two new compounds. What type of reaction is this?
    9·1 answer
  • La formula estructural del eter butil pentilico
    10·1 answer
  • What role does weathering have in shaping Earth’s surface?
    8·2 answers
  • A student practicing for the outdoor track team begins to sweat. To what stimulus is the body responding?
    7·2 answers
  • Can someone help me out with why is the outer core of Earth is important in you’re own words?! A mini paragraph plsss
    14·1 answer
  • Calculate δs∘rxn for the reaction2no(g) o2(g)→2no2(g)express your answer to one decimal place and include the appropriate units
    8·1 answer
  • What way do S waves move
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!