CHEM 107 Towson University Chemistry The Haber Process Worksheet
- Need assistance with answering the following question for funds of chemistry. I can attach entire form for more details but this is the concept of the questions.
- Write a balanced thermochemical equation with phase labels for the Haber process with the heat energy as part of the equation. (3 pts)
- What is the theoretical yield of ammonia (in grams) if 16.55 grams of nitrogen gas and 10.15 grams of hydrogen gas are allowed to react? (9 pts)
- Based on your theoretical yield, what is the percent yield of ammonia if only 8.33 grams of ammonia is produced? (3 pts)
- How much heat energy (in kJ) will be absorbed or released if 8.33 grams of ammonia is produced? State whether the energy will be absorbed or released. (4 pts)
- Ammonia gas reacts with aqueous nitric acid to form aqueous ammonium nitrate, a fertilizer.
- Compare and contrast the positive and negative effects that result from the use of the Haber process. Discuss the controversy that followed the awarding of the Nobel Prize in Chemistry to Haber. Based on this discussion, do you think Haber should have been awarded this prestigious award for his work? Explain. (22 pts)
(a) Write the balanced chemical equation for the reaction, including the physical states. (2 pts)
(b) Write the complete ionic and the net ionic equations for the reaction. (7 pts)
CHEM 107: Fundamentals of Chemistry
The Haber Process
Introduction:
While the majority component of air is nitrogen (N2), the gas is very unreactive because of its stability due to the triple
bonds that hold the nitrogen atoms together. Nitrogen gas is, therefore, relatively unavailable for chemical reactions.
One of the few ways to “fix” nitrogen, making a nitrogen compound from the elemental nitrogen in the atmosphere, is
the Haber process (aka Haber-Bosch process). In this reaction, nitrogen gas combines with hydrogen gas to yield
ammonia. The enthalpy (ΔH) of this reaction is −92.22 kJ.
This process was discovered by the German chemist Fritz Haber in the early twentieth century. Through extensive
experimentation, Haber found the conditions that would produce adequate yields (at a temperature of about 500 oC and
a pressure of about 200 atm). This process holds a significant importance today because of its application in the
industrial production of ammonia-based fertilizer. In 1918, Haber received the Nobel Prize in Chemistry for his work.
However, a lot of controversy followed the Nobel Prize award.
For this experiment, 16.55 grams of nitrogen gas and 10.15 grams of hydrogen gas are allowed to react in the reaction
vessel. The ammonia vapor that is produced is then condensed, liquefied, and collected into a collection vessel.
QUESTION SHEET
Students must work individually. The following questions refer to the reaction described above. Answer the questions
on the Answer Sheet provided. Make sure to put your student ID number on each page. ANY ANSWERS THAT ARE
NOT WRITTEN ON THE ANSWER SHEET WILL NOT BE GRADED. MAKE SURE TO TURN IN BOTH THE QUESTION SHEET
AND THE ANSWER SHEET.
You must show all relevant work clearly and completely. Sentences must be used to state answers on the lines
provided. Appropriate use of significant figures and units is required in order to receive full credit.
1. Write a balanced thermochemical equation with phase labels for the Haber process with the heat energy as part
of the equation. (3 pts)
2. What is the theoretical yield of ammonia (in grams) if 16.55 grams of nitrogen gas and 10.15 grams of hydrogen
gas are allowed to react? (9 pts)
3. Based on your theoretical yield, what is the percent yield of ammonia if only 8.33 grams of ammonia is
produced? (3 pts)
4. How much heat energy (in kJ) will be absorbed or released if 8.33 grams of ammonia is produced? State
whether the energy will be absorbed or released. (4 pts)
5. Ammonia gas reacts with aqueous nitric acid to form aqueous ammonium nitrate, a fertilizer.
(a) Write the balanced chemical equation for the reaction, including the physical states. (2 pts)
(b) Write the complete ionic and the net ionic equations for the reaction. (7 pts)
6. Compare and contrast the positive and negative effects that result from the use of the Haber process. Discuss
the controversy that followed the awarding of the Nobel Prize in Chemistry to Haber. Based on this discussion,
do you think Haber should have been awarded this prestigious award for his work? Explain. (22 pts)
Rev 4/2020
ANSWER SHEET
Instructions: Use sentences when stating the answers. You must show clear work for #2 through #4 in order to receive
full credit for the answers to those questions. Appropriate use of significant figures and units is required in order to
receive full credit.
1.
Answer:
2.
Show calculations (use dimensional analysis):
Answer _____________________________________________________________________________
3.
Show calculations:
Answer ______________________________________________________________________________
Rev 4/2020
4. Show calculations (use dimensional analysis):
Answer ______________________________________________________________________________
5. Answer:
6. Provide your answer to question #6 as a written response.
Your discussion must be typed, doubled-spaced in Times New Roman 12pt font, a minimum 300 and maximum 600
words in length (excluding the references) and written in APA style (http://libraryguides.ccbcmd.edu/Citations/apa)
with appropriate reference page and title page. No abstract is needed.
You must use at least two (2) credible, academically appropriate sources of information to support your work.
(Wikipedia and other general on-line encyclopedias are not considered acceptable sources while subject-specific
encyclopedias provided in the CCBC reference database are acceptable.)
Rev 4/2020
