Q: The equations above show that 6.69 x 10^(-27) kg of input hydrogen fuel will produce 4.3 x 10^(-12) Joules of energy. How much energy would 1 kg of hydrogen produce? 4.3 x 10^(-12) J X Joules -------------------- = ------------------- 6.69 x 10^(-27) kg 1 kg We re-arrange to solve for X Joules: 4.3 x 10^(-12) J X = 1 kg * ---------------------- 6.69 x 10^(-27) kg = 6.4 x 10^(14) Joules How does that compare to the energy produced by burning 1 kg of gasoline? Recall that 1 kg of gasoline produces about 45 million Joules. The fusion process is about 14 million times more efficient per kg than the chemical reaction!