Question

Beyond simple thermal decomposition, an even more effective means of obtaining energy from NH4ClO4(s) \rm NH_4ClO_4(s) is to mix this oxidizer with a fuel. When NH4ClO4(s) is employed in solid-fuel booster rockets, it is packed with powdered aluminum. The powdered aluminum is the fuel, and the ammonium perchlorate is the oxidizer. Two of the reactions occurring on ignition are

6NH4ClO4(s)+10Al(s)2NH4ClO4(s)+2Al(s)??5Al2O3(s)+6HCl(g)+9H2O(g)+3N2(g),?H1=?4392.5 kJ

Al2O3(s)+2HCl(g)+3H2O(g)+2NO(g),?H2=?1172.6 k

Which of the following statements are correct?

Check all that apply.

a.All nitrogen atoms lose three electrons in both reactions.

b.Chlorine is reduced from + +7 to ? -1 in both reactions.

c.Reaction 2 produces more energy per gram of Al \rm Al.

d.The thrust produced by the formation of gaseous products is greater per mole of ammonium perchlorate in Reaction 2.

Answer 1

b.Chlorine is reduced from + +7 to ? -1 in both reactions.

Step-by-step explanation:

From the reactions shown, the reaction equations are redox. It is clear that in both reactions, chlorine has oxidation numbers of +7 on the lefthand side of the reaction equation and -1 on the right hand side of the reaction equation. This buttresses the point that the reactions are redox as earlier stated.

Hence this is the only true statement is that;.Chlorine is reduced from + +7 to ? -1 in both reactions.