23) A reaction that is spontaneous can be described as A) releasing heat to the

Question

23) A reaction that is spontaneous can be described as A) releasing heat to the surroundings B) proceeding in both the forward and reverse directions. C) proceeding without external influence once it has begun. D) having the same rate in both the forward and reverse directions. E) increasing in disorder. 24) N2 +02-2NOAH=43.2 kcal Based on the reaction shown, which statement is true? A) 43.2 kcal are consumed when 1.00 g of O2 reacts B) 43.2 kcal are consumed when 1.00 mole of NO is produced. C) 43.2 kcal are consumed when 1.00 mole of O2 reacts. D) 43.2 kcal are consumed when 1.00 g of N2 reacts. E) 43.2 kcal are consumed when 1.00 g of NO is produced. 25) Reaction rates are determined by all of the following factors except A) the activation energy of the reaction. B) the force of collisions between molecules. C) the number of collisions between molecules D) the spontaneity of the reaction. E) the orientation of collisions between molecules. 26) Determine the number of moles of water produced when one mole of NH3 reacts accordin reaction shown. 4 NH3+502-4NO+6 H20 A) 1.00 B) 0.67 C) 1.33 D) 1.50 ent best describes the way a catalyst works? A) It increases the value of AH B) It increases the value of Eact C) It decreases the value of AH. D) It increases the value of AG. E) It decreases the value of Eact

Explanation / Answer

Ans 23 : C) proceeding without external influence once it has begun.

The reaction is said to be spontaneous , if it proceeds without any external influence. These reactions are also called as exergonic reactions. A roaring bonfire is an excellent example of spontaneous reactions, as it does not require any energy to proceed further.

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