Chemical Kinetics and Nuclear ChemistryEasy
Question
For an endothermic reaction, energy of activation is Ea and enthalpy of reaction is ᐃH (both of these in KJ/mol). Minimum value of Ea will be
Options
A.less then ᐃH
B.equal to ᐃH
C.more then ᐃH
D.equal to zero
Solution
In endothermic reactions, energy of reactants is less than that of the products.
Potential energy diagram for endothermic reactions is,
where, Ea = activation energy of backward reaction
E′a = activation energy of backward reaction
ᐃH = enthalpy of the reaction
From the above diagram,
Ea = E′a + ᐃH
Thus, Ea >ᐃH
Potential energy diagram for endothermic reactions is,
where, Ea = activation energy of backward reaction
E′a = activation energy of backward reaction
ᐃH = enthalpy of the reaction
From the above diagram,
Ea = E′a + ᐃH
Thus, Ea >ᐃH
Create a free account to view solution
View Solution FreeTopic: Chemical Kinetics and Nuclear Chemistry·Practice all Chemical Kinetics and Nuclear Chemistry questions
More Chemical Kinetics and Nuclear Chemistry Questions
The correct increasing order of basic strength for the following compounds is :...For a zero-order reaction,...Half life is independent of the concentration of A. After 10 min volume of N2 gas is 10 L and after complete reaction is...The half-life for the first-order reaction H2O2(aq) → H2O(l) + ½O2(g) is 30 minutes. If the volume of O2(g) collected is...In the above question solution is optically inactive when :...