The exothermic formation of `C1F_(3)` is represented by the equation `C1_(2(g)) + 3F_(2(g))hArr2C1F_(3(g))` , `Delta H = - 329 kJ` Which of the following will increase the quantity of `C1F_(3)` in an equilibrium mixture of `C1_(2)`, `F_(2)` and `C1F_(3)`