Question

Delta*g < 0 for spontaneous reactions. by definition, a galvanic cell must have an e cell ^ 0 of what value, for such reactions? select the correct answer below. greater than 0 equal to 0 less than 0 there is not enough information to determine this.

Answer 1

A galvanic cell must have a cell potential (Ecell) greater than zero for spontaneous reactions. In a galvanic cell, the value of Ecell must be greater than 0 for a spontaneous reaction with a negative value of ΔG. This is because a positive cell potential indicates a spontaneous reaction. Therefore, for a spontaneous reaction with a negative value of ΔG, the Ecell of a galvanic cell must be greater than 0.

Step-by-step explanation:

The question relates to the relationship between cell potential (Ecell) and spontaneity of electrochemical reactions in galvanic cells. By definition, for a reaction to be spontaneous, the Gibbs free energy change (delta G) must be less than zero (delta G correlates with a positive cell potential (Ecell < 0), which is a requirement for a galvanic cell to function. Therefore, the correct answer is that a galvanic cell must have an Ecell > 0 to ensure the overall reaction will occur spontaneously.