15.9 6th edition


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Madeline Ho 1C
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Joined: Mon Apr 23, 2018 3:00 am

15.9 6th edition

Postby Madeline Ho 1C » Tue Mar 05, 2019 12:41 am

15.9 Express the units for rate constants when the concentrations are in moles per liter and time is in seconds for (a) zero-order reactions; (b) first-order reactions; (c) second order reactions.
What does it mean for a reaction to have zero-order?

Neil Hsu 2A
Posts: 61
Joined: Fri Sep 28, 2018 12:16 am

Re: 15.9 6th edition

Postby Neil Hsu 2A » Tue Mar 05, 2019 9:14 am

Zeroth order reactions mean that changing the concentration of any reactant will not affect the rate at which the reaction proceeds. In terms of the question, the rate law is rate = k, so k has units of M/s

Matthew Choi 2H
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Re: 15.9 6th edition

Postby Matthew Choi 2H » Tue Mar 05, 2019 2:45 pm

Normally, you will see that changing the concentration of the reactants will affect the rate of the reaction. However in a zero-order reaction, changing the concentration will not change the rate. Therefore, the rate will equal the k constant. In order for the rate to have the units of mol/(L*s), k will have the units mol/(L*s).

tierra parker 1J
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Re: 15.9 6th edition

Postby tierra parker 1J » Tue Mar 05, 2019 3:06 pm

zero order reaction means that the concentration the reactant has no effect on the rate of the reaction so even if you increase the amount of reactant the reaction will proceed at the same time. the unit for the rate constant will be M/s


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