659.4 kJ 12.42 kJ 6 points Question 11 1. How many kJ of heat are released by th

Question

659.4 kJ 12.42 kJ 6 points Question 11 1. How many kJ of heat are released by the complete oxidation of 1.00 gram of ammonia according to the following balanced thermochemical equation ? ? ? 23.8 kJ 1.95 x102 kJ 13.3 kJ 338 kJ 5.67 x 10.5 kJ 18.5 k ? 752 kJ 6 points Question 12 1. Refer to this equation. 2Cu(NOs hts) >2CuO(s) 4NO2(g) + Or( If 10.00 mol Cu(NOs)2 reacts completely and if Temperature-315 K and P-1.00 atm, what is work in kJ? ? 11,0 kJ 11.0 kJ 0.762 kJ ? 0.762 kJ C 65.5 k ? 65,5 kJ 89.3 kJ

Explanation / Answer

Question 11)

we have

dH(rxn) = - 904 kJ/mole rxn for the reaction

4 NH3 (s) + 5 O2 (g) ----------------> 4 NO (g) + 6 H2O (g)

and

dH(rxn) per mole NH3 = - 904 kJ/mole / 4 moles of NH3 = - 226 kJ/mole

mass of NH3 = 1.0 g

and

moles of NH3 = mass / molar mass = 1.0 g / 17 g/mole = 0.059 mole

and

heat released = - ( dH(rxn) ) x moles of NH3

or

heat released = - ( - 226 kJ/mole ) x 0.059 mole = 13.3 kJ

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