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
Vlada [557]
3 years ago
8

Methanol has a normal boiling point of 64.6C and a heat of vaporization of 35.2 kJ/mol. What is the vapor pressure (in Torr) of

methanol at 12.0C
Chemistry
1 answer:
DENIUS [597]3 years ago
7 0

Answer:

vapor pressure of methanol at 12.0C = 75.09 torr

Explanation:

Using Clausius Clapeyron equation

, we have that

ln (P2/P1)= (ΔHvap /R) (1/T1 - 1/T2)

Given

At Normal boiling point,

Temperature T1= 64.6°C = 64.6 + 273 = 337.6 K, Pressure,P1 = 1 atm

Heat of vaporization  = 35.2 kJ/mol

Changing to  J/mol

=35.2 x 1000= 35200 J/mol

Temperature , T2 = 12.0oC = 12 + 273 = 285 K

Using gas constant, R = 8.314 J/mol.K

ln (P2/P1)= -(ΔHvap /R) (1/T1 - 1/T2)

ln (P2/ 1 atm) = (35200 J/mol/ (8.314 J/mol.K) X( 1/337.6 - 1/285)

ln (P2/ 1 atm) =4,233.822 X (0.00296-0.003508)

ln (P2/ 1 atm)  = 4,233.822468  x-0.0005466866

ln (P2/ 1 atm)=  -2.31457

P2 = e^⁻2.31457 x 1 atm

P2=0.098808atm

= 0.098808atm  x760 = 75.09 torr

You might be interested in
How would the equilibrium change if NO2 were added to SO2(g) + NO2(g) NO(g) + SO3(g) + heat?
ahrayia [7]
The answer to this question would be that the amount of No and SO3 would increase. The correct choice is C. 
5 0
3 years ago
Read 2 more answers
Determine the number of electrons, neutrons and protons in an atom of arsenic -75.
qwelly [4]
Protons-33
neutrons-42
electrons-33
8 0
4 years ago
An acid is:
ladessa [460]
The best and most correct answer among the choices provided by your question is the third choice or letter C.

An acid is any substance containing a hydrogen molecule.

I hope my answer has come to your help. Thank you for posting your question here in Brainly. We hope to answer more of your questions and inquiries soon. Have a nice day ahead!
6 0
3 years ago
Read 2 more answers
Which force acts an an object to move it from rest or a constant, straight-line motion?
maxonik [38]

Answer:

C. Unbalanced

Explanation:

A force which can change the state of an object by changing it's speed, position or direction of motion is known as an unbalanced force. It is the resultant of all forces which are acting on a body and causing a change in the state of rest of motion of the body.

Assume a box is resting on the floor. The forces acting on the box in the rest are Normal (by the ground on the box) in upward direction and gravitational force Mg (due to gravity). Although these two forces are acting on the box, it is still in rest because these forces are balanced to each other. When we pull or push the box by applying appropriate force, the box will start to move because the force applied by us is unbalanced and there is no any force in the opposite direction to make this force balanced.

8 0
3 years ago
State the law multiple proportions
pav-90 [236]
The law of multiple proportions is..
Different compounds made of same element have different proportions by mass of those elements.
6 0
3 years ago
Read 2 more answers
Other questions:
  • How many grams of O2(g) are needed to completely burn 46.0 g C3H8(g)?
    13·1 answer
  • The crystals that form in a magma that cools more slowly than those from another magma will be _________.
    5·2 answers
  • pleaaaaaaaaaaaaaaaase answerrrrrrr quickkkkkkkkkkk am scared can somebody write me a small kinda article about fractional distil
    13·1 answer
  • Which functional group is found in an ester?
    6·2 answers
  • Suggest a pH value for lemonade
    13·1 answer
  • Of the following three atoms, one tends to lose three electrons, another tends to lose two electrons, and another tends to lose
    8·1 answer
  • identify a happiness chemical and at least one activity you can do to increase this chemical in your brain.​
    11·2 answers
  • What is h2OO??????????
    15·1 answer
  • Write the chemical equation of in elements
    6·1 answer
  • Picture of the question is below, if answered correctly, I will reward with brainliest.
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!