ENTHALPY / REACTION RATES /
Name: _________________________________
REACTION COORDINATES
Class: 2A / 3A / 5A Date: ________________
2B / 3B / 5B
Specify whether each reaction is endothermic (ENDO) or exothermic (EXO).
__________ burning of wood
__________ Fe (s) + O2 (g) → Fe2O3 (s) + heat
__________ a beaker that feels cold to the touch after two substances have been mixed
__________ when two chemicals mix, their temperature rises
__________ a solid burns brightly and releases heat, light, and sound
__________ when two chemicals mix, their temperature drops
__________ two chemicals will only react if you heat them continually
__________ plants take in light for photosynthesis
__________ a beaker that feels hot to the touch after two substances have been mixed
__________ dissolution of effervescent tablets in water (Ideal Gas Law Lab!)
True (T) / False (F). This action will most likely cause the rate of reaction to increase:
_____ removing a catalyst or enzyme from the reaction
_____ lowering the temperature of the reactants
_____ stirring / agitating the reactants
_____ raising the temperature of the reactants
_____ using a less concentrated reactant (a diluted solution)
_____ decreasing the surface area of the reactants
_____ adding a catalyst or enzyme to the reaction
_____ increasing the surface area of the reactants
Fill in the blanks on the reaction coordinate diagram with the appropriate letter.
A.
B.
C.
D.
E.
F.
reactants
products
catalyst
transition state / activated complex
energy change (∆E)
activation energy (Ea)
Is the reaction endothermic or exothermic?
Calculate ∆E for this reaction.
CHEMISTRY MYP | KHAN
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ENTHALPY / REACTION RATES / REACTION COORDINATES
Is the reaction endothermic or exothermic?
Select the letter that represents the following:
_____ energy of reactants
_____ energy of activated complex
_____ energy of products
_____ ∆E for the forward reaction
_____ Ea for the forward reaction
_____ ∆E for the reverse reaction
_____ Ea for the reverse reaction
Is the reaction endothermic or exothermic?
Select the letter that represents the following:
_____ energy of reactants
_____ energy of products
_____ ∆E for the uncatalyzed reaction
_____ ∆E for the catalyzed reaction
_____ Ea for the uncatalyzed reaction
_____ Ea energy for the catalyzed reaction
_____ energy of activated complex for the uncatalyzed reaction
_____ energy of activated complex for the catalyzed reaction
Calculate the following values (include unit):
CHEMISTRY MYP | KHAN
for the forward reaction:
for the reverse reaction:
________ H of reactants
________ H of reactants
________ H of activated complex
________ H of activated complex
________ H of products
________ H of products
________ activation energy
________ activation energy
________ enthalpy change
________ enthalpy change
endothermic or exothermic?
endothermic or exothermic?
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