Rate Equation Calculations (AQA A-Level Chemistry): Quizzes

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Rate Equation Calculations
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What are the units of the rate of a reaction?

mol dm−3^{-3} s−1^{-1}

What are the units of the rate constant kk for a first-order reaction?

s−1^{-1}

What are the units of kk for a second-order reaction?

mol−1^{-1} dm3^{3} s−1^{-1}

What are the units of kk for a third-order reaction?

mol−2^{-2} dm6^{6} s−1^{-1}

For Rate =k[A]2[B]= k[A]^{2}[B], what is the overall order?

3

In the Arrhenius equation, what does AA represent?

Arrhenius constant (pre-exponential factor)

What is the value of the gas constant RR used in the Arrhenius equation?

8.31 J K−1^{-1} mol−1^{-1}

What is the slope when plotting ln⁡k\ln k versus 1T\frac{1}{T}?

−EaR-\frac{E_a}{R}

What is the y-intercept when plotting ln⁡k\ln k versus 1T\frac{1}{T}?

ln⁡A\ln A

Given Rate =k[A]2[B]= k[A]^{2}[B], [A]=0.5=0.5, [B]=0.1=0.1, Rate=0.025=0.025 mol dm−3^{-3} s−1^{-1}. Find kk.

1 mol−2^{-2} dm6^{6} s−1^{-1}

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Equilibrium constant (Kp) for Homogeneous Systems (A Level only)

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