J.R. S. answered 10/30/19
Ph.D. University Professor with 10+ years Tutoring Experience
C(s) + 2F2(g) ==> CF4(g) ∆H = 141.3 kJ/mole
From this balanced equation we know that to make 1 mole of CF4 requires 141.3 kJ of energy.
Thus, to produce 0.913 moles of CF4 will take slightly less than that amount of energy.
141.3 kJ/mole x 0.913 moles = 129 kJ