page 11 21. Consider the reaction pathway shown below. ΔH = b ΔH = c ΔH = d ΔH = a Y Z W X According to Hess’s Law A b = a - c - d B b = a + c + d C b = d - c + a D b = d + c - a. 22. Which of the following is not a factor that affects the rate of a reaction? A Activation energy B Kinetic energies of reactant molecules C Concentration of reactants D Enthalpy change of reaction 23. In which of the following reactions would the yield of product be increased by lowering the pressure? A H2(g) + I2(g) ∏ 2HI(g) B N2(g) + 3H2(g) ∏ 2NH3(g) C N2O4(g) ∏ 2NO2(g) D CO(g) + 2H2(g) ∏ CH3OH(g) [Turn over
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This question is part of the UK A-Level Chemistry syllabus. In the actual exam, structured questions typically require linking specific keywords to gain full marks. Applaa helps you drill these topics.
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