The mean amount of energy needed for one mole of a given type of gaseous bonds to undergo homolytic fission.
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Describe and explain the effect of increasing pressure on reaction rate
Increasing the pressure increases the reaction rate because it increases the particles in a given volume so there are more successful collisions per unit time.
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Explain why a catalyst reduces the demand for energy
A catalyst provides an alternative pathway with a lower activation energy so the reaction can take place at lower temperatures
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What is meant by the term homologous series?
Have the same chemical properties due to the same functional group and each successive member differs by a CH2 unit
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What does a curly arrow in a reaction mechanism represent?
Movement of electron pairs
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Radical substitution can produce a mixture of product - explain why
Further (multiple) substitutions can occur at different positions along the chain. Free radicals are very reactive and can react in more than one termination step to form other products
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Apart from heat loss, suggest 2 reasons why the calculated value of enthalpy change of combustion is different from the data book value.
Incomplete combustion has occurred and non-standard conditions were used.
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Other cards in this set
Card 2
Front
Describe and explain the effect of increasing pressure on reaction rate
Back
Increasing the pressure increases the reaction rate because it increases the particles in a given volume so there are more successful collisions per unit time.
Card 3
Front
Explain why a catalyst reduces the demand for energy
Back
Card 4
Front
What is meant by the term homologous series?
Back
Card 5
Front
What does a curly arrow in a reaction mechanism represent?
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