CHEMISTRY HELP-thanks!

Test Preparation SAT Subject Test Preparation
1

<p>Hi, I am just having a hard time understanding Gibbs free energy law.</p>

<p>Problem.
The following reactions occured at stp. examine the values of g and answer the questions that follow.
Reaction 1: g-82.4 kJ/mol
reaction 2: g: -67.8kJ/mol
reaction 3: g: -150kJ/mol
reaction 4: g: 0.00 kJ mol</p>

<p>Q's
Which of these reactions are spontaneous, which are nonspontaneous, which are at equilibrium? explain
Which of these release free energy that can perform work?
which reaction produces the greatest amt of free energy?Which reaction requires the greatest input of energy to proceed?
which of these rxns favor the production of reactants? which favors products? which rxn favors both products and reactants equally? </p>

<p>Thanks in advance</p>

2

<p>Question 1:
Reaction 1: G is negative, spontaneous.
Reaction 2: Same.
Reaction 3: Same.
Reaction 4: At equilibrium, G is 0.</p>

<p>Question 4:
Reactions 1, 2, and 3 favor the production of products. This is because the reactions are spontaneous in the forward direction.
Reaction 4 favors both products and reactants equally. This is because the reaction is at equilibrium.</p>