Pick the balanced equation for each of the following changes. Make sure "heat" is in appropriate place (if at all).
The combustion of 1 mol of liquid ethanol (C₂H₅OH)

a. C₂H₆O(l) + 3O₂(g) → 2CO₂(g) + 3H₂O(g) + heat
b. C₂H₆O(l) + 3O₂(g) + heat → 2CO₂(g) + 3H₂O(g)
c. C₂H₆O(l) + 3O₂(g) → 2CO₂(g) + 3H₂O(g)
d. C₂H₆O(l) + 3O₂(g) → 2CO₂(l) + 3H₂O(g) + heat