The standard reaction Gibbs energy for a chemical reaction at an absolute temperature is given by , where and are non-zero constants. Which of the following is true about this reaction?

(1) Exothe

Question

The standard reaction Gibbs energy for a chemical reaction at an absolute temperature  is given by , where  and  are non-zero constants. Which of the following is true about this reaction?

(1) Exothermic if 
(2) Endothermic if 
(3) Endothermic if  and 
(4) Exothermic if  and

Canvas Classes · Accepted Answer

Strategy:
 Compare the empirical linear equation  with the fundamental Gibbs equation .

Step 1: Map the constants
- 
-

Step 2: Evaluate statement
An exothermic reaction has  (meaning ).
An endothermic reaction has  (meaning ).
Thus, if , the reaction is endothermic.

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