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    Master this deck with 14 terms through effective study methods.

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    Created by @ladinmonty

    What distinguishes exothermic reactions from endothermic reactions?

    Exothermic reactions release heat, raising temperature; endothermic absorb heat, lowering temperature.

    What happens to energy during a chemical reaction?

    Energy is needed to break bonds and released when new bonds form.

    How does a reaction pathway diagram indicate if a reaction is exothermic?

    Products lower in energy than reactants indicate an exothermic reaction.

    What is activation energy?

    The minimum energy required for a reaction to occur.

    How does a catalyst affect activation energy in a reaction pathway diagram?

    A catalyst lowers the activation energy peak without changing reactant or product energy.

    What energy changes occur during bond breaking and bond making?

    Bond breaking requires energy; bond making releases energy.

    Why are some reactions exothermic while others are endothermic?

    Exothermic reactions release more energy forming bonds than is absorbed breaking them.

    What can be concluded if a reaction feels cold to touch?

    It is endothermic, absorbing heat from the surroundings.

    Why do reactions with low activation energy occur faster?

    More particles have sufficient energy for successful collisions.

    Why does a reaction that releases energy still require activation energy?

    Initial energy is needed to break bonds before more energy is released.

    How does adding a catalyst change a reaction pathway diagram?

    The activation energy peak is lower, but start and end energy levels remain unchanged.

    Why is bond breaking always considered endothermic?

    Energy is needed to overcome the forces holding atoms in a bond.

    What is the overall energy change if bond breaking requires 500 kJ/mol and bond forming releases 650 kJ/mol?

    The overall energy change is +150 kJ/mol, indicating an exothermic reaction.

    Why are catalysts important in industrial processes?

    They lower activation energy, speeding up reactions and reducing costs.