The diagram shows the reaction pathway for a given reaction without the use of a catalyst. reactants products energy reaction pathway Which information correctly describes the effect of the catalyst on the activation energy and enthalpy change for the reaction?

5070_w08_qp_1

MCQ

2008

Paper 1, Variant 0

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The energy profile for the forward direction of a reversible reaction is shown...

5070_w10_qp_11

MCQ

2010

Paper 1, Variant 1

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The energy profile for the forward direction of a reversible reaction is shown...

5070_w10_qp_12

MCQ

2010

Paper 1, Variant 2

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Nitrogen and oxygen react according to the equation. N2+ 2O2→ 2NO2The enthalpy change for the reaction shown...

5070_w13_qp_11

MCQ

2013

Paper 1, Variant 1

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The energy diagram for the reaction between aqueous sodium hydroxide and dilute hydrochloric acid is shown...

5070_w13_qp_12

MCQ

2013

Paper 1, Variant 2

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The enthalpy changes when methane, butane and octane are burned completely in oxygen are shown...

5070_w15_qp_11

MCQ

2015

Paper 1, Variant 1

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The energy profile diagram for a reaction is shown...

5070_w15_qp_11

MCQ

2015

Paper 1, Variant 1

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Compound Y reacts with oxygen. This reaction has a positive enthalpy change of reaction, ∆H. What information can be deduced about Y and its reaction with oxygen?

5070_w17_qp_12

MCQ

2017

Paper 1, Variant 2

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The equation represents the reaction between two gases, X2 and Y2, to form compound XY. X2+ Y2→ 2XYThe energy profile diagram for the reaction is shown...

5070_w18_qp_11

MCQ

2018

Paper 1, Variant 1

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A fuel is completely burned in air. Carbon dioxide, water and heat are produced. Which energy profile diagram is correct for burning a fuel?

5070_w18_qp_12

MCQ

2018

Paper 1, Variant 2

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