this is chemical engineering questions not chemistry question. a, b, C... I need

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this is chemical engineering questions not chemistry question.

a, b, C... I need the answer for these questions please.

KENG 23 ppond Phyeical Chemctry Sen 1 2014 2015 Question No. 3: what infirmation can you okain by studying lhe chemical kinetics of areacton? Does a balanced chemical equation provide the same information? Why or why not? 11-S why does the reaction rate of virtually all reactions increase with an increase in,, temperature? ne Speed e) In a typical laboratory setting, a reaction is carried out in a venailated hood with air gh yield of a product in the winter gave a low yield of that same product in the summer, even though his technique did not ehange and the reagents and concentrations used were identical. What is a piausible explanation for the different yields? [ 13] circulation provided by outside air. A student noticed that a reaction that gave a hi

Explanation / Answer

a) Chemical Kinetics mean study of chemical reaction to provide rate law expression, suggest reaction mechanism and so that various factors affecting rate of reaction can be obtained. Kinetics provide information about all intermediate products formed in a reaction. By analysing these intermediate steps, a suitable rate law is find for complete reaction.

A balanced chemical equation will not provide all these information as chemical equation shows only molar information regarding reaction which means for how many moles of reactant how many moles of product shall be formed. A balanced chemical equation shall not give any information about intermediate formed during the course of reaction neither what may be the possible rate law of reaction.

b) Every chemical reaction has a specific value of activation energy for reactant molecules. Molecules having energy greater than activation energy take part in the reaction and convert to product. Molecules with energy less than activation energy do not take part in reaction. Energy of molecules is dependent on reaction. On increasing the temperature, energy of molecules increase and number of molecules having energy greater than activation energy increases. Thus higher number of molecules take part in reaction so rate of reaction increases on increasing temperature.

ç) In this experiment circulation of ambient air maintains temperature of reaction medium. When temperature of ambient air is high, air provides reactant molecules higher heat which results in high reaction rate as higher number of molecules cross activation energy barrier. High reaction rate means high yield of product. Similarly during winter, cold air shall transfer less energy to reactant molecules thus fraction of molecules which have energy greater than activation energy shall be less so rate of reaction shall be lower during winter which shall result in lower yield during winter.

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