Section 8. Reaction kinetics for Chemistry, A Level - revisedeck

8. Reaction kinetics

A section of Chemistry, 9701

Listing 10 of 220 questions

Which statements are correct about the activation energy of a reaction?

9701_w07_qp_1

MCQ

2007

Paper 1, Variant 0

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In a calorimetric experiment 1.60 g of a fuel is burnt. 45 % of the energy released is absorbed by 200 g of water whose temperature rises from 18 °C to 66 °C. The specific heat capacity of water is 4.2 J g–1 K–1. What is the total energy released per gram of fuel burnt?

9701_w10_qp_11

MCQ

2010

Paper 1, Variant 1

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Which diagram correctly represents the Boltzmann distribution of molecular energies at two temperatures T1 and T2, where T1 = 300 K and T2 = 310 K?

9701_w10_qp_12

MCQ

2010

Paper 1, Variant 2

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Many, but not all, organic reactions need to be heated before reaction occurs. Which reaction occurs at a good rate at room temperature (20 °C)?

9701_w10_qp_12

MCQ

2010

Paper 1, Variant 2

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In a calorimetric experiment 1.60 g of a fuel is burnt. 45 % of the energy released is absorbed by 200 g of water whose temperature rises from 18 °C to 66 °C. The specific heat capacity of water is 4.2 J g–1 K–1. What is the total energy released per gram of fuel burnt?

9701_w10_qp_13

MCQ

2010

Paper 1, Variant 3

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The gaseous compound Z decomposes on heating. In the diagram below, Boltzmann distributions for Z at two different temperatures P and Q are shown...

9701_w12_qp_13

MCQ

2012

Paper 1, Variant 3

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The diagram below represents, for a given temperature, the Boltzmann distribution of the kinetic energy of the molecules in a mixture of two gases that react slowly together. The activation energy for the reaction, Ea, is marked. When the reaction is catalysed, the rate of reaction increases a little. What will be the position of Ea for the catalysed reaction?

9701_w14_qp_13

MCQ

2014

Paper 1, Variant 3

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Which statements correctly describe an effect of a rise in temperature on a gas-phase reaction?

9701_w15_qp_11

MCQ

2015

Paper 1, Variant 1

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Which statements correctly describe an effect of a rise in temperature on a gas-phase reaction?

9701_w15_qp_13

MCQ

2015

Paper 1, Variant 3

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The diagram represents, for a given temperature, the Boltzmann distribution of the kinetic energies of the molecules in a mixture of two gases that react together. The activation energy for the reaction, Ea , is marked. molecular energy proportion of molecules with a given energy Ea The dotted curves below show the Boltzmann distribution for the same reaction at a higher temperature. On these diagrams, H represents the activation energy at the higher temperature. Which diagram is correct?

9701_w16_qp_11

MCQ

2016

Paper 1, Variant 1

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Questions Discovered

220