energetics Flashcards
1
Q
enthalpy change
A
the heat change in a reaction at constant pressure
2
Q
standard conditions
A
100kPa
298K (25°C)
3
Q
endothermic
A
reactions that absorb energy from the surroundings
products higher in energy on reaction profile
enthalpy change is positive
4
Q
exothermic reactions
A
reactions that release energy to the surroundings
products lower in energy than reactants on reaction profile
enthalpy change is negative
5
Q
what happens when bonds are broken
A
energy needs to be absorbed
endothermic
enthalpy change is positive
