Energetics/Calorimetry Quiz
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15 Terms
energy
measure of ability to do work
heat (q)
a measure of total kinetic energy (KE) of particles in a substance
temperature
average KE of particles in a substance
enthalpy (H)
amount of heat in a substance
open system
matter and energy can escape
closed system
matter can’t escape but energy can
isolated system
neither matter not energy can escape
exothermic reaction
heat is released from the system to the surroundings
endothermic reaction
heat is absorbed by the system from the surroundings
transition state / activation complex
the point where all bonds between atoms/ions of reactants have been broken in an chemical reaction
activation energy
the amount of energy needed to break all bonds between atoms/ions of reactants in a chemical reaction
1st Law of Thermodynamics
all energy is conserved (energy cannot be created or destroyed)
calorimetry
an experimental technique used to measure energy changes in chemical systems
calorimeter
a device which measures the heat released or absorbed when a chemical reaction occurs
specific heat capacity
the amount of energy needed to raise the temperature of 1 g of a substance by 1°C