PLEASE HELP.
Which of the following processes would you predict to have a positive value for ΔSºreaction ?

2SO2(g) + O2(g) → 2 SO3(g)

P4O10(s) + 6H2O(l) → 4H3PO4(s)

2POCl3(g) → 2PCl3(g) + O2(g)

2H2(g) + O2(g) → 2H2O(l)

Question

PLEASE HELP.
Which of the following processes would you predict to have a positive value for ΔSºreaction ?

2SO2(g) + O2(g) → 2 SO3(g)

P4O10(s) + 6H2O(l) → 4H3PO4(s)

2POCl3(g) → 2PCl3(g) + O2(g)

2H2(g) + O2(g) → 2H2O(l)

dtan5457 · Answer

A positive delta s (entropy) is directed towards a spontaneous reaction.

You have more disorder (entropy) when

-temperature increases
-phases changes 
-there are more products than reactants 
-placed in a solution

anonymous · Answer

Okay, but I don't understand what any of it means. I don't know how to find the answer.

dtan5457 · Answer

They let you choose one, or multiple answers?

anonymous · Answer

@dtan5457 one.

dtan5457 · Answer

Then I would go with 2POCl3(g) → 2PCl3(g) + O2(g)
-based on there having more products than reactants

dtan5457 · Answer

Let me know if I'm right ^_^

anonymous · Answer

@dtan5457 you were correct! Thank you so much!

dtan5457 · Answer

Your welcome..feel free to fan and tag me into more questions.