The decomposition of NI

3

to form N

2

and I

2

releases −

290.0 kJ

of energy. The reaction can be represented as2NI

3

(s)→N

2

(g)+3I

2

(g), ΔH

rxn

=−290.0 kJ

Find the change in enthaply when 14.0 g

of NI

3

decomposes.

Express your answer to three significant figures and include the appropriate units.