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CHEM 121 MODULE 5 EXAM QUESTIONS WITH COMPLETE SOLUTIONS VERIFIED $9.99   Add to cart

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CHEM 121 MODULE 5 EXAM QUESTIONS WITH COMPLETE SOLUTIONS VERIFIED

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CHEM 121 MODULE 5 EXAM QUESTIONS WITH COMPLETE SOLUTIONS VERIFIED kinetics the study of rates of reactions and how they are influenced by certain factors like concentration, temp, catalysts, and surface area increase of temp causes increase in reaction rate, since the higher temp provides a hi...

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  • June 22, 2024
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  • 2023/2024
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CHEM 121 MODULE 5 EXAM QUESTIONS WITH

COMPLETE SOLUTIONS VERIFIED

kinetics

the study of rates of reactions and how they are influenced by certain factors like

concentration, temp, catalysts, and surface area

increase of temp

causes increase in reaction rate, since the higher temp provides a higher kinetic energy

for the reacting particles.

catalyst

a substance that increases the rate of a reaction without being consumed int he overall

reaction (lowers activation energy)

increase in surface area

causes solid reactant rate to increase due to the increased surface area of the particles

of solid reactants (by grinding solid into a fine powder) since solids can only react at

their surfaces.

increase in concentration

causes reaction rate to increase since this provides more of the reacting particles to

undergo the next reaction, but occasionally the rxn rate is unaffected (but that is very

rare)

, rate determining step

rate of a reaction is always determined by the slowest step, if slowest step isn't a

reactant for example then changing the concentration of rxn wont change the overall

reaction rate

reaction rate

the increase in molar concentration of product per unit of time or the decrease in molar

concentration of reactant per unit of time usually expressed in moles per liter per

second (mol/L*s)

∆t

change in time (defined as tf-ti)

∆[ ]

change in molar concentration (which is defined as conc f - conc i)

instantaneous rates...

decrease as rxn proceeds since the concentration of reactants becomes smaller due to

consumption of reactants and the rate finally becomes 0 as reaction stops

rate law

a mathematical equation that describes the dependence of the reaction rate on the

concentrations of some of the reactants

rate laws must be determined...

experimentally. and should always be understood that exponents (x) and (y) aren't

necessarily equal to the coefficients (a and b) of reactants A and B in the balanced

reaction

order

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