Post a Contest

Need Help With Chemistry Questions below

Status: Closed
Prize: $40
Entries Received: 1
Winner: martyydeligero

Winner

Contest Brief

1. Using the tables of thermodynamic data in Appendix D of your textbook, determine
both ΔGo
rxn and ΔGrxn, 1200K for each of the following unbalanced reactions:
a. FeO(s) + CO2(g)  Fe2O3(s) + CO(g)
b. CH4(g) + Cl2(g)  CH2Cl2(g) + 2HCl(g)
c. CH3CN(l) + H2O(l)  CH3OH(l) + HCN(g)

21. Describe the types of energy transfers and transformations involved in the following
processes:
a. A parked car is started and driven off the edge of a cliff into a lake below.
b. A marathon runner’s schedule is to consume a large spaghetti dinner, sleep for 8
hours, then run 42km in approximately 4 hours with occasional cups of Gatorade
and water.
2. Using the table of bond energies on page 131 of your textbook, estimate the reaction
energies of the following chemical reactions (you may look up the structures of the
compounds if you are not familiar with them):
a. 2CH3-CH=CH2 + 2NH3 + 3O2 → 2CH2=CH-C≡N + 6H2O
(propylene + ammonia + oxygen  acrylonitrile + water)
b. This reaction has two steps (like a 2-step mechanism, but shown in one line). Give
the reaction energies for step 12, step 23, and step 13. How do these
portions compare?
Cl2 + H2C=CH2  ClH2C-CH2Cl  H2C=CHCl + HCl
(chlorine + ethylene  1,2-dichloroethane  vinyl chloride + hydrogen chloride)
3. Using Hess’ Law and the thermochemical equations provided, calculate ΔHo
rxn for the
following reaction: HCl(g) + NaNO2(s)  HNO2(l) + NaCl(s)
Thermochemical equations:
2NaCl(s) + H2O(l)  2HCl(g) + Na2O(s) ΔHo = +507.31 kJ
NO(g) + NO2(g) + Na2O(s)  2NaNO2(s) ΔHo = -427.14 kJ
NO(g) + NO2(g)  N2O(g) + O2(g) ΔHo = -42.68 kJ
2HNO2(l)  N2O(g) + O2(g) + H2O(l) ΔHo = +35.35 kJ

Recommended Skills

Winner

Post a Contest Like This

Public Clarification Board

martyydeligero
- 6 years ago
Please #increaseprize
- 6 years ago
ketchupmedia
- 6 years ago
also give table from page 131
- 6 years ago
1. Contest Holder
  - 6 years ago
  https://www.google.ca/search?q=enthalpy+table&rlz=1C1CHBF_enCA774CA774&source=lnms&tbm=isch&sa=X&ved=0ahUKEwjyjaGgm5zaAhWB34MKHX0sA4gQ_AUICigB&biw=1920&bih=987#imgrc=XssvYZjPn5J39M:
  - 6 years ago
2. Contest Holder
  - 6 years ago
  They were referring to the enthalpy table when they were talking about the table.
  - 6 years ago
ketchupmedia
- 6 years ago
#increaseprize pls
- 6 years ago
1. Contest Holder
  - 6 years ago
  IO will increase it to 45$ but you'll need it get it done by today then.
  - 6 years ago
ketchupmedia
- 6 years ago
can you give - tables of thermodynamic data in Appendix D
- 6 years ago