The decomposition of n i 3 to form n 2 and i 2 releases − 290.0 kj of energy. the reaction can be represented as 2n i 3 (s)→ n 2 (g)+3 i 2 (g), δh rxn =−290.0 kj find the change in enthaply when 10.0 g of n i 3 decomposes. express your answer to three significant figures and include the appropriate units.

The change in enthaply when 10.0 g of nitrogen triiodide decomposes is -3.67 kJ.

Explanation:

Enthalpy of the reaction when 2 moles of nitrogen triiodide decomposed =

Enthalpy of the reaction when 1 moles of nitrogen triiodide decomposed :

Mass of nitrogen triiodide decomposed = 10.0 g

Moles of nitrogen triiodide =

Change in enthaply when 0.02532 moles of nitrogen triiodide decomposed:

o conteúdo de calor de um sistema é igual à entalpia apenas para um sistema que é constante