(delta)Ssys Chem Question

Question

Hi, i'm wondering if someone could tell me how to answer this question

1. Calculate the value of (delta)Ssys for the following reaction, using the information on the table below.

Substance-----------------------So(J/m... K)

Fe(s)---------------------------------...

Fe(OH)3 -----------------------------107

O2(g)--------------------------------- 205

H2O(l) --------------------------------70

note all the numbers are positive, dashes are just meant to separate the numbers.

any help would be grateful. And please show your work!

Answer 1

2Fe(s)+ 3/2O2(g) + 3H2O   -> 2Fe(OH)3(s)

dS = prod - reactants

dS = [(2) (107)] - [(2)(27) & (3/2)(205)  &  (3) (70)]

dS = [214]     - [54 & 307.5 &  210 ]

dS = [214]     - [571.5 ]

dS = - 357.5 Joules

but yoiu might want to round your answer off to: dS = - 376 Joules

Answer 2

I see no reaction given.

Answer 3

i am guess there should be a reaction here... and if this is the topic of hess law, then.. the sum of all the heat either evolved or liberated = the total heat evolved or liberated at the end of the reaction...

delta h = h1 +h2 +h3+h4

i.e.. 27 + 107 +205 +70 = +409 KJ

Answer 4

It can't be solved if a reaction is not given.