Fill in Order Details

  • Submit paper details for free using our simple order form

Make Payment Securely

  • Add funds to your account. There are no upfront payments. The writer will only be paid once you have approved your paper

Writing Process

  • The best qualified expert writer is assigned to work on your order
  • Your paper is written to standard and delivered as per your instructions

Download your paper

  • Download the completed paper from your online account or your email
  • You can request a plagiarism and quality report along with your paper

Physical chemistry

Physical chemistry

1) a) One mole of an ideal gas with Cv = 3R/2 undergoes the transformations
described in the following list from an initial state described by T = 300 K and P =
1.00 bar. Calculate Q, W, ?U, ?H, and ?S for each process
i. The gas is heated to 450 K at a constant external pressure of 1.00 bar.
ii. The gas is heated to 450 K at a constant volume corresponding to the initial
iii. The gas undergoes a reversible isothermal expansion at 300 K until the
pressure is half of its initial value.
b) Calculate ?SSURR and ?STOTAL for each of the processes described in a). Which of
the processes is/are a spontaneous process? The state of the surroundings for each
part is as follow:
i. 450 K, 1.00 bar
ii. 450 K, 1.00 bar
iii. 300 K, 0.50 bar
2) a) i. Draw a standard phase diagram for a pure component and indicate on it the
different phases, the triple point and the critical point.
ii. Which equation is used to calculate the phase boundaries?
iii. In which conditions are the phase boundaries assimilated to straight lines?
b) Ice melts under pressure. This has been used as an explanation for the possibility
of ice-skating. Let’s check the facts.
ce = 0.917 g cm–3; ?water = 1.000 g cm–3; Mwater = 18.02 g mol–1;
?fusH°ice = 6.030 kJ mol–1; at atmospheric pressure P1 = 101,325 Pa, the melting
temperature of ice is T1 = 273.15 K.
i. An ice-skater of 80 kg uses 2 mm wide and 220 mm long blades. Calculate
the melting temperature of water under the blades.
ii. The ice of an ice rink is usually kept at –6 °C. Does the ice melt under the
pressure of the ice skater?
3) a) i. What are the conditions of ideality for two components to form an ideal
ii. What are the two cases where a real solution can be approximated to an
ideal solution? Briefly explain.
b) A 2 L closed bottle of carbonated water contains 9 g of dissolved CO2. Henry’s law
constant for the solubility of CO2 in water at 25 °C = 0.163 × 104 atm
Vapour pressure of pure water at 25 °C = 3,200 Pa
i. Explain briefly why Henry’s law can be used to calculate the partial vapour
pressure of CO2 in the bottle.
ii. Calculate the total vapour pressure in the bottle.
iii. Calculate the volume of CO2 degasing once the bottle is open at
atmospheric pressure. Assume CO2 is a perfect gas.
4) The attractive electrostatic interaction energy between two molecules having
permanent dipoles and oriented in the most favourable arrangement is given by:
|q1| = 0.32e and |q2| = 0.28e
l1 = 112 pm and l2 = 178 pm
a) Calculate the dipole moments (µ1 and µ2 in C m) for the two molecules.
b) Calculate the electrostatic interaction energy (in kJ mol–1) between these two
dipolar molecules when r = 0.5 nm.


  • Google Rating
  • Sitejabber
  • Trustpilot
Zahraa S
Zahraa S
Absolutely spot on. I have had the best experience with Elite Academic Research and all my work have scored highly. Thank you for your professionalism and using expert writers with vast and outstanding knowledge in their fields. I highly recommend any day and time.
Stuart L
Stuart L
Thanks for keeping me sane for getting everything out of the way, I’ve been stuck working more than full time and balancing the rest but I’m glad you’ve been ensuring my school work is taken care of. I'll recommend Elite Academic Research to anyone who seeks quality academic help, thank you so much!



Consider Your Assignments Done

“All my friends and I are getting help from eliteacademicresearch. It’s every college student’s best kept secret!”

Jermaine Byrant

“I was apprehensive at first. But I must say it was a great experience and well worth the price. I got an A!”

Nicole Johnson
Finance & Economics

Our Top Experts


See Why Our Clients Hire Us Again And Again!


Avg Rating


Elite Academic Research Promises You:

Always on Time

If we are a minute late, the work is on us – it’s free!


If the work we produce contains plagiarism we’ll pay out a £5,000 guarantee.


Providing quality work is core to our beliefs, which is why we will strive to give you exactly that, and more!

Written to Standard

All of our assignments go through a stringent quality checking process from start to finish.

Success Guarantee

When you order form the best, some of your greatest problems as a student are solved!






Pay an expert to take your online class and say goodbye to poor grades, missed deadlines, and the struggles
of balancing your education with other work/life responsibilities. Life Is too Short to Spend on Classes
You Have No Interest In. Focus on what is really important in your life. Let our professional handle your class.

    Guaranteed A or B

    100% Confidential

    Experienced Tutors

    24/7 Support

Fill in free quote request

Tell us about your online class and what help you need. Try to give us the maximum information.

Agree on price

Our representative will contact you to discuss the details of your order and the rates for our assistance.

Pay and get help

When everything is agreed, you will receive an email with the invoice. After you pay, we start working on your task.