Wednesday
April 23, 2014

Homework Help: Chemistry

Posted by Katherine on Friday, March 9, 2012 at 1:42pm.

For the reaction described by the chemical equation:
3C2H2(g) -> C6H6(l) .. Delta H rxn = -633.1 kJ/mol
a) Calculate the value of Delta S rxn at 25.0 C...
b) Calculate Delta G rxn...
c) In which direction is the reaction, as written, spontaneous at 25 C and 1 bar pressure?
- forward, reverse, neither, or both?

here's what i did:
Delta S = [1(173.4 J/mol-k)] - [3(200.9)]
Delta S = -429.3 J/mol-k

Delta G = Delta H - T(Delta S)
Delta G = (-633.1 kJ/mol) - (298 K)(-0.4293 kJ/mol-k) = -505.168 kJ/mol

if that's right so far.. yay! but can someone explain how a reaction can be spontaneous forwardly or reversely? right now i only know that a reaction is spontaneous if delta G is a negative number.. please help!

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

Chem 3A - please help me with this chemistry problem. 1) Write out a balanced ...
Chemistry - In a reaction chamber, 3.0mol of aluminum is mixed with 5.3mol Cl2 ...
chemistry - what is the name of reaction for 3C2H2--> C6H6?
HARD CHEM QUESTION - A chemical system within a sealed 1 L reaction vessel is ...
Chemistry - A chemical system within a sealed 1 L reaction vessel is described ...
chemistry - Reacting Mg with acid solution to form Mg salt and Hydrogen gas. ...
chemistry - What is the complete ionic equation for the double displacement ...
Chemistry - What type of reaction may be occurring when a person's skin develops...
Chemistry - please help - 1. Write the balanced chemical equation for the single...
Chemistry - Based on the following chemical equation answer the question below ...

Search
Members