View the step-by-step solution to:

Chem 111 Quiz 5 Fall 2012 Name: 1. Draw the correct Lewis Structures of the following molecules and identify their molecular geometry (2 pts each)

a soild compound is a poor conductor of electricity. when dissolved in water, it becomes a good conductor of electricty.
what type of chemical bonding would most likely be founded in this compound?

Chem 111 Quiz 5 Fall 2012 Name: 1. Draw the correct Lewis Structures of the following molecules and identify their molecular geometry (2 pts each) ( hint : check formal charges to identify the correct structure). a) CS 2 b) CH 2 O c) CCl 3 F d) NO 2 Cl 2. Which of the following substances will exhibit dipole forces? (2 pts) a. SO 3 b. H 2 S c. CH 4 d. SF 6 3. Freon-113, C 2 Cl 3 F 3 , has an enthalpy of vaporization of 27.04 kJ/mol and a normal boiling point of 48 ° C. At what temperature is the vapor pressure of Freon-113 equal to 76.0 mm Hg? ( R = 8.31 J/K mol) (3 pts) 4. The phase diagram for CO 2 has a triple point at –56.6 ° C and 5.19 atm, and a critical point at 31.0 ° C and 73 atm. The solid and gas phases are in equilibrium at –78.7 ° C and 1.00 atm. Which of the following statements regarding CO 2 is/are CORRECT? (2 pts) 1. Sublimation occurs if the temperature of the solid phase is increased from – 79.0 ° C to 0.0 ° C at a constant pressure of 2.5 atm. 2. CO 2 is a supercritical fluid at 55 ° C and 75 atm. 3. At pressures greater than its critical pressure (73 atm), CO 2 will not exist as a solid at any temperature. a. 1 only b. 2 only
Background image of page 1
c. 3 only d. 1 and 2 5. Determine the heat of reaction for the decomposition of one mole of benzene to acetylene (2 pts) C 6 H 6 ( l ) 3C 2 H 2 ( g ) given the following thermochemical equations: 2C 6 H 6 ( l ) + 15O 2 ( g ) 12CO 2 ( g ) + 6H 2 O( g ) H = - 6271 kJ 2C 2 H 2 ( g ) + 5O 2 ( g ) 4CO 2 ( g ) + 2H 2 O( g ) H = - 2511 kJ 6. Carbon and oxygen react to give carbon dioxide. The reaction of 4.49 g C( s ) with 9.21 g O 2 ( g ) releases - 113.2 kJ of heat. What is the enthalpy of formation of CO 2 ( g )? (2 pts)
Background image of page 2

Recently Asked Questions

Why Join Course Hero?

Course Hero has all the homework and study help you need to succeed! We’ve got course-specific notes, study guides, and practice tests along with expert tutors.

-

Educational Resources
  • -

    Study Documents

    Find the best study resources around, tagged to your specific courses. Share your own to gain free Course Hero access.

    Browse Documents
  • -

    Question & Answers

    Get one-on-one homework help from our expert tutors—available online 24/7. Ask your own questions or browse existing Q&A threads. Satisfaction guaranteed!

    Ask a Question