Define ‘activation energy’ of a reaction.
1 Answers
Talk Doctor Online in Bissoy App
(a) Define kinetic energy of an object. Can kinetic energy of an object be negative? Give reason.
(a) Kinetic energy of an object is defined as the energy possessed by a body by virtue of its motion. It is given by, K.E = 1/2 mv2 No, the kinetic energy...
1 Answers 1 views
he activation energy of a reaction is 94.14 KJ/mol and the value of rate constant at 40º C is 1.8 x10-1 sec-1 . Calculate the frequency factor A.
Given, Ea = 94.14 x103 J mol-1 , T = 40 + 273 = 313 K, K = 1.8 x 10-1 sec-1 By using, A = antilog (10.9635) = 9.194 x1010 sec-l
1 Answers 1 views
The decomposition of A into product has value of K as 4.5 x 103 sec-1 at 10º C and energy of activation 60 kJ/mol.
your the answer 24º C
1 Answers 1 views
The activation energy of a reaction is 94.14 KJ/mol and the value of rate constant at 40º C is 1.8 x 10-1 sec-1.
Given, Ea = 94.14 x 103 J mol-1, T = 40 + 273 =313 K, K = 1.8 x 10-1 sec-1 By using, A = antilog (10.9635) = 9.194 x 1010 sec-1
1 Answers 2 views
Define a chemical reaction. State four observations which help us to determine that a chemical reaction
Process in which new substances with new properties are formed by the rearrangement of atoms is known as chemical reaction. (i) Evolution of gas : The chemical reaction between zinc and...
1 Answers 1 views
Consider an endothermic reaction X → Y with the activation energies Eb and Ef for the backward and forward reactions,
(a) : For endothermic reaction, ΔH = +ve ΔH = Ef – Eb , it means Eb < Ef .
1 Answers 1 views
The energies of activation for forward and reverse reactions for A2 + B2 ⇋ 2AB are 180kJ mol^–1 and 200kJ mol^–1 respectively.
(a) : ΔHR = Ef - Eb = 180 - 200 = - 20 kJ mol–1. The correct answer for this question should be –20kJ mol– 1. But no option given is...
1 Answers 1 views
Define the following: (i) Elementary step in a reaction (ii) Rate of a 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...
1 Answers 1 views
The trigger for activation of toxin of Bacillus thuringiensis is: a. Acidic pH of stomach
c. Alkaline pH of gut
1 Answers 1 views
Define a chemical reaction. State four observations which help us to determine that a chemical reaction has taken place.
Process in which new substances with new properties are formed by the rearrangement of atoms is known as a chemical reaction. (i) Evolution of gas: The chemical reaction between zinc and dilute H2SO4. Zn(s)+H2SO4(aq) → ZnSO4(sq) +H2(g)↑ (ii) Change in...
1 Answers 1 views