Which of the following reactions have a positive δsrxn? check all that apply.

2a(g)+b(> c(g)

a(g)+b(> 3c(g)

2a(g)+3b(> 4c(g)

2a(g)+b(> 3c(g)

A(g) + B(g) → 3C(g).

Explanation:

As the no. of gaseous molecules increases in the product side than the reactants, disordering occurs and ΔSrxn be more positive.

as in: A(g) + B(g) → 3C(g).

the no. of gaseous molecules in the reactants side (2) and be (3) in the products side, disorder increases.

While, as the no. of gaseous molecules decreases in the product side than the reactants, ordering occurs and ΔSrxn be more negative.

as in:

2A(g) + B(g) → C(g) ,

the no. of gaseous molecules in the reactants side (3) and be (1) in the products side, ordering increases.

2A(g) + 3B(g) → 4C(g) ,

the no. of gaseous molecules in the reactants side (5) and be (4) in the products side, ordering increases.

2A(g) + B(s) → 3C(g).

the no. of gaseous molecules in the reactants side (3) and be (3) in the products side, ordering is the same.

atomic mass = 39

number of neutrons = 20

number of protons= 19

electronic configuration = 1s2 2s2 2p6 3s2 3p6 4s1

the number of electron in first shell = 2

number of electrons in n=3 shell = 8