Formation of tetrafluoroethylene from its elements is highly exothermic. Assume
ID: 486481 • Letter: F
Question
Formation of tetrafluoroethylene from its elements is highly exothermic. Assume an equilibrium mixture. 2 F2(g) + 2 C(s, graphite) F2C=CF2(g) How will the reaction shift if F2 is added to the system? Imagine a bacteria is added that eats F2C=CF2 to make Teflon polymer. How will the reaction shift in response? How will the reaction shift if solid graphite is added? (Be careful here!) How will the reaction shift if the container is crushed to one-eighth its original volume? How will the reaction shift if the system is heated?Explanation / Answer
a)
If we add a reactant, the shift goes toward MORE production of Fe2C=CF2
b)
If the product is decreased, the reaciton trend is toward MORE production of Fe2C=CF2
c)
No effect, since solid has activity = 1 and more will not affect the equilibrium
d)
if we decrease volume, we increase pressure, this favours the LEAST mol formation, that is, the products (1 mol vs 2mol of reactants)
so F2C=CF2 is favoured
e
If this is exothermic, addition of heat will reverse the reaction... so the product concentratin decreases