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Chem 1020 Exam 2 Questions and answers latest update 2024
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Chem 1020 Exam 2 Questions and answers latest update 2024
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Chem 1020 Exam 2what sign do products show? - correct answer positive
what sign do reactants show? - correct answer negative
what does rate depend on? - correct answer temperature, catalysts, surface area/mixing (entropy),
pressure, amount of reactants/products (concentration)
what happens when you double the concentration of [A] in a first order reaction? - correct answer the
rate also doubles; rate = k[A]
what happens when you double the concentration of [B] in a second order reaction? - correct answer
the rate quadruples; rate = k[B]^2
what equation should be used when only one concentration is changing? - correct answer r2/r1 =
(c2/c1)^m
helpful hints for solving for an order with one changing concentration: - correct answer put the bigger
rate on top for easier math; round to the nearest integer; make sure c2 and c1 are different numbers
how do you figure out the overall order of a reaction? - correct answer add all orders for each reactant
what units tell us we are looking at a zeroth order reaction? - correct answer k = amount/time ; (mol/L)
what is a common example of a zeroth order reaction? - correct answer sand going through an hourglass
what units tell us we are looking at a first order reaction? - correct answer k = 1/time or k = time^-1 ;
(1/sec or sec^-1)
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