Module 3b Energy, rates & equilibria: I can……..
Pre Topic
Test
Describe the enthalpy change of endo/exothermic reactions (E)
Construct enthalpy profile diagrams for endo/exothermic reactions, including the effect of catalysts (C)
Define the terms: Standard conditions/states, enthalpy change of reaction/formation/combustion/neutralisation (E)
Calculate enthalpy changes using experimental results using the equations Q=mcT (B)
Explain the term ‘average bond enthalpy’ (C)
Use provided bond enthalpy values to calculate enthalpy change (B)
Explain endo/exothermic reactions in terms of making & breaking bonds (B)
Use Hess’ law to construct enthalpy cycles & calculate enthalpy change of a reaction using enthalpy change of
formation/combustion data. Includes multi-step & unfamiliar cycles (A)
Describe the techniques/methods that can be used to determine enthalpy change directly & indirectly (C)
Explain, in terms of particles, the effect of changing reactant concentration & pressure on the rate of a reaction (D)
Describe the techniques/methods that could be used to investigate the rate of a reaction (D)
Calculate using the gradient of graphs the rate of a reaction (e.g drawing tangents on conc-time graphs) (C)
Explain how a catalyst increases the rate of a reaction (C)
Explain the difference between homogeneous & heterogeneous catalysts (E)
Explain the industrial importance of catalysts (C)
Draw & then use Boltzmann distribution curves to explain the effect of changing temperature & adding a catalyst (B)
Define the term: dynamic equilibrium
Use le Chatelier’s principle to explain the shift in equilibrium that results from changing temperature, pressure or
concentration (A)
Describe & explain the effect adding a catalyst has on the position of the chemical equilibrium (B)
Describe the techniques/methods that could be used to investigate changes to the position of equilibrium (C)
Explain the need for compromise between chemical equilibrium & reaction rate in industry (eg. Haber process) (B)
Write expressions for Kc (D)
Calculate the value of Kc when provided with equilibrium concentrations (C)
Estimate the position of equilibrium based on the magnitude of Kc (C)
Pre Revision Revision
Mock
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