Question

What is the heat absorbed in kcal and kJ when 2.50 moles of NO are produced from oxygen and nitrogen?

N2(g)+O2(g)→2NO(g)N2(g)+O2(g)→2NO(g)

ΔHΔH = +43.0 kcal/molO2kcal/molO2 or +180 kJ/molO2kJ/molO2

The following equation shows the conversion of aluminum oxide (from the ore bauxite) to aluminum:

2Al2O3(s) → 4Al(s)+3O2(g)2Al2O3(s) → 4Al(s)+3O2(g), ΔHΔH = +801 kcalkcal (+3350 kJkJ )

How many kilocalories are required to produce 1.15 molmol of aluminum?.

How many kilojoules are required to produce 1.15 molmol of aluminum?

	How many kilocalories are required to produce 14.6 gg of aluminum? How many kilojoules are required to produce 14.6 gg of aluminum?

Answer 1

Answen 0 N2 (9) + 02 (3) ► 2009) (H = +43.0, Kcal/mol I mole of Ne realt with AH = +180 Kg/mol. Imole of oor mole of or produces amoles of NO(g), the energy absorbed io 4300 kcallme or 180 kJ/mol. NOW, The molar mass of NO = 30.01 gimol. 2 When 2 O moles of no produces the heat absorbed = 43.0 Kcal/mol, All 2.50 moles of no produces the heat absorbed = 43 _X 2.5 kcal/mol = 53.75 kcal feat. And 2.50 moles of no produces the heat absorb - 180x215 skylamet = 2251K3 free! 2 2Al203 (5) ► 4 Al(s) + 30279 ) aH=+801 kcal . From this equation, SH = +3350 Kg 2 moles of AlgO BIs premalo react to produces 4 moles of Alls) and 3 moles of oxygen gas. The ha heal absorbed is +801 kcal or +33 50 KJ . -CScanned with CamScanner

1. n. 115 moles amount of when 4 moles of aluminium produces, the heat absor a required = 801 kcal. 0 1'15 moles of aluminium produces, the amount of - heat required = 801x1115 i 4 +2928 a = [232.8 kcal 115 moles of aluminium produces, the ammnt of heat required = 3350 x1115 ky = 963.1251K5 (11) molan mass of Al = 26.98 gimol. i A moles of Al = (26.98 x4) = 107.92 g. NOW, 107.92 g of Ad aluminium produces, the amount of a heat required = 801 kcal 1446 g of aluminium produces, the amount of A heat required = 801 *1406 =108.367 kcal. ( 14.6 g of aluminium produces, the amount of a heat required = 3350 x 14.6 KT = 1453.21 *9 ES Scanned with CamScanner 107.90 kcal 107,92 Kg