This is a many-page plot point in Kim Stanley Robinson's Mars Trilogy. Highly recommended to all interested in the colonization of Mars.
14,000 kg would be equal to 98,000 tonnes of CO2. Trivial amount of heating, esp. since atmospheric forcing is weaker on Mars since the Sun is further away.
Incidentally the Mars Trilogy is some of the best hard sci-fi out there. Absolutely not to be missed.
I reread it a year or two back, and it's standing the test of time very well, in spite of the fact that Red Mars was first published almost 21 years ago and the story begins in the 2020s.
According to the wiki article on the topic ([0], citing [1]), you could get significant terraforming of Mars with something on the order of 39 million tons of CFCs. One Falcon rocket can carry 14 tons there, so that would naively 2.8 million Falcon launches, at a current cost (@$100MM/launch) of $280 trillion. (And surprisingly little terrestrial CO2 emissions -- only about 3 billion tons).
As ealloc points out [2], this particular fluorine compound isn't very different, as a greenhouse gas, from the other CFCs these estimates are based on.
Well, the Martian atmosphere is apparently around 25 teratonnes, so I would be surprised if a warming effect from the addition of 14,000kg of any known gas at martian air pressure and temperature would be either measurable or in any sane way even calculable.
The melting point of Fluorinert is -50 C. The average temperature on Mars is, if I recall correctly, -50 to -60 C. The material would tend to precipitate out over the poles and stay there. Another source of warming would be required for it to produce any long-term effects.
14,000 kg would be equal to 98,000 tonnes of CO2. Trivial amount of heating, esp. since atmospheric forcing is weaker on Mars since the Sun is further away.