Predict the sign for delta Ssys CH3CH2CH3(g) +5O2(g)-> 3CO2(g) + 4H2

[Jbreezy]

predict the sign for delta Ssys CH3CH2CH3(g) +5O2(g)---> 3CO2(g) + 4H2

Homework Statement

predict the sign for delta Ssys CH3CH2CH3(g) +5O2(g)---> 3CO2(g) + 4H20(l)


The same question for N205(g) --> NO2(g) + NO3(g)

Homework Equations

The Attempt at a Solution

I said the first was negative because it is combustion rxn and is more stable after the rxn.

The second one I said positive because now you have more molecules?

Good or no? Thanks

 

[TeethWhitener]

You're looking for a change in entropy. In general, the system with a larger number of moles of gaseous molecules has the higher entropy.