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Alexus [3.1K]
3 years ago
8

When a catalyst is added to a system at equilibrium, a decrease occurs in the 1. activation energy

Chemistry
2 answers:
Reptile [31]3 years ago
8 0
Activation energy.  catalysts work by changing the reaction mechanism in a way that lowers the activation energy required for the forward and reverse reaction.
lozanna [386]3 years ago
5 0
As a catalyst is added, the amount of heat required (2) is reduced
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Explanation:

Heat of reaction or enthalpy change is the energy released or absorbed during the course of the reaction.

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\Delta H=H_{products}-H_{reactants}

\Delta H = enthalpy change = ?

H_{products} = enthalpy of products

H_{reactants} = enthalpy of reactants

For the given reaction :

2NO_2(g)\rightarrow N_2O_4(l)

\Delta H=H_{N_2O_4}-2\times H_{NO_2}

\Delta H=-20kJ/mol-(+66kJ/mol)

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When an aqueous solution of KBr is electrolyzed,
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