Use Hess's Law or the summation equation to calculate the ΔHrxn. Round to the nearest tenth!! ___NF(g) + ___F2 (g) --> ___NF2 (g) ½N2 (g) + ½F2 (g) -> NF (g) Hf = 86.6 kJ ½N2 (g) + F2 (g) -> NF2 (g) Hf = 33.8 kJ

ΔHrxn = -60 kJ ( to the nearest tenth)

Explanation:

The balanced chemical reaction for the equation is given as;

N2(g) + 3 F2(g) -->  2 NF3(g)

The individual steps are;

½N2 (g) + ½F2 (g) -> NF (g) Hf = 86.6 kJ

Turning the reaction above around (the energy sign would also change), we have;

NF (g) --> ½N2 (g) + ½F2 (g)  Hf = - 86.6 kJ

½N2 (g) + F2 (g) -> NF2 (g) Hf = 33.8 kJ

Adding both reactions above and canceling the common entities, we have;

½N2 (g) + F2 (g) + NF (g) -->  ½N2 (g) + ½F2 (g) +  NF2 (g) Hf = -52.8 kJ

Taking out the common compound in both sides of the reaction, we have;

F2 (g) + NF (g) --> ½F2 (g) +  NF2 (g) Hf = -52.8 kJ

ΔHrxn = - 52.8 kJ

ΔHrxn = -60 kJ ( to the nearest tenth)

answer

fusion: the energy source of stars. the energy released from the collapse of the gas into a protostar causes the center of the protostar to become extremely hot. when the core is hot enough, nuclear fusion commences. fusion is the process where two hydrogen atoms combine to form a helium atom, releasing energy.

hope it

a boiling water reactor does not boil the water. a pressurized water reactor boils the water faster. a pressurized water reactor is heated directly by the core. a pressurized water reactor does not use fission.