Question

The chemical reaction shown was performed and the concentration of HCI was measured over time. CI,(g) + CHCI,(g) HC(g) +CCI,(8) The (HCI) after 25 s was 0.153 mol/L. After 132 s, the (HCI) was 0.374 mol/L. Calculate the rate of reaction. rate of reaction: mol HCIL

Answer 1

Q @ riven chemical reaction cla(g) + CHCl3 (8) Hellgltcelulo7 Concentration of Ha at ass ine, Нcta 2 Sя — о. І з сло4] Нc) at 13, 2 б. 374 м. 1. we know that

Rate of Change in concentration reaction = of reactant or product time taken to complete reaction Rate of reaction of Hello) - change in concentration of Hae 1 time taken I = (0.374 -0.153) croll 0.221 mod (132-25) second(s) 107 second(s) I = 0.00206 Molll I Hence, rate of reaction a 10.00206 Mol Hell S. 6 Activation energy (Ea) is defined as the minimum amount of energy or Kinetic energy required for particles to participate in a chemical reaction. for... reaction to occur particles must posses. minimum Kinetic energy lie activation energy. Hence, definition best describes the term activation energy (Ea) is the minimum kinetic energy that Particles must posses for a chemical reaction to occur.

Given diagram Transition . state Energy (Kilmol) Products Here. EatActivation energy Hea AH Enthalpy of reaction + -- -- we know that in Endothermic reaction en of product is greater than the energy of reactantine. Enthaupy of reaction Coho) is Reaction progress positive while in Exothermic reaction energy of products is lower than energy of reactants lie enthalpy of reaction is negative. Here in above diagram e energy of products is lower than energy of reactants so Reaction is exothermic reaction. Hence in above diagram Exothermic reaction take Place. Answer- Exothermic reaction! we know that activation energy Leas of reaction - energy of transition state - enersy of reactants - (15o - 125) KIlmol = 25 KTlmodo Hence, Activation energy : 125 Kilmal factors affecting or influence the rate of chemical reaction are as follows: (i) Concentration of Reactants - (in) Nature of reactants and surface area (rii) changing in temperature presence or addring a catalyst Presence of solvents such as polar erotic, Polar a protic. Hence. Al factors adding catalyst, changing the temperature the nature of reactants and Changing the concentration of reactants influence rate of chemical reaction.

Given general reaction At BC - ABC we know e know that Reaction rate is i.e - Change in concentration equal to taken if we increase reaction rate reaction will completed in less time or product will formed soon. if we decrease reaction rate reaction will completed in more time or for formation of Products time taken will be higher.. we know that rate of reaction is inversely related to time taken for completion of reaction. sou if reaction rate increases time taken For completion of reaction will be less, so rate of reaction will be faster or increase. ction rate decreases time taken for completion of reaction will be more than rate reaction will be slower or decrease.