Question

Mathematically combine the three given reactions so that they sum to give a balanced chemical equation describing the production of propane, C3H8(g), from its elements, C(s,graphite) and H2(g). Show your intermediate steps. For example, if you must reverse reaction (c), write the reverse in the appropriate format; if you multiply reaction (a) by 2, write the updated equation. Make sure to enter the overall balanced equation at the bottom.

a. C3H8(g)+ 5O2(g) → 3CO2(g) + 4H2O(l)
b. C(s)+ O2(g) → CO2(g)
c. H2(g)+ 1/2O2→ H2O(l)

Answer 1

The answer is in the explanation.

Step-by-step explanation:

The reaction you want to obtain is:

3C(s) + 4H₂(g) → C₃H₈(g)

The sum of 3(b) + 4(c):

3b. 3C(s) + 3O₂(g) → 3CO₂

4c. 4H₂(g) + 2O₂(g) → 4H₂O(l)

3C(s) + 4H₂(g) + 5O₂(g) → 3CO₂(g) + 4H₂O(l)

Now, this reaction -(a):

-a. 3CO₂(g) + 4H₂O(l) → C₃H₈(g) + 5O₂(g)

3C(s) + 4H₂(g) → C₃H₈(g)