Energy Flashcards

-∆H means the reaction is

exothermic

energy is released to the surroundings

exothermic

surroundings warm up; reaction “feels hot” as temperature of reaction mixture increases

exothermic

exothermic

Mg & HCl respiration & combustion are all

exothermic

dissolving NH4Cl & photosynthesis are both….

endothermic

change of state S → L & L → G are both

endothermic

change of state G → L & L → S are both

exothermic

+∆H means the reaction is

endothermic

energy is absorbed from the surroundings

endothermic

surroundings cool down; reaction “feels cold” as temperature of reaction mixture decreases

endothermic

endothermic

reactants have more energy than the products

exothermic

reactants have less energy than the products

endothermic

bond making is always

exothermic

bond breaking is always

endothermic

units for enthalpy changes

kJ or kJ mol-1

Ea/activation energy

enthalpy change ∆H (+∆H)