What is meant by an elementary reaction .

In endothermic reaction, heat is absorbed whereas in exothermic reaction, heat is evolved.

For a reaction to be spontaneous, ∆G should be negative.  ∆G = ∆H – T∆S  According to the question, for the given reaction,  ∆S = positive  ∆H = negative (since heat is evolved)  ⇒ ∆G...

Entropy is zero only at absolute zero. Enthalpy of formation is the heat change involved in the formation of one mole of the substance from its elements. An element formed...

A reaction which takes place in one step is called an elementary reaction. For example : H2 + I2 => 2HI. 

 t 2 = 2t 1 because for 3/4th of the reaction to complete time required is equal to two half lives

No, an elementary process would have a rate law with orders equal to its molecularities and therefore must be in integral form.

AgNO3(aq) + NaCl(aq)   -----> AgCl(s) ↓+  NaNO3(aq) Silver nitrate      Sodium chloride    Silver chloride (ppt.)   Sodium nitrate

(A) combination reaction

i. Decomposition reaction ii. Displacement reaction iii. Double displacement reaction iv. Combination reaction v. Displacement reaction vi. Combination reaction

(i) Elementary step: Each step of a complex reaction is called an elementary step. (ii) Rate of reaction: It is the change in the concentration of any of the reactants or products...