UNIT 3 Flashcards
(14 cards)
Equation for molar volume
n= Vol / Mvol
On a graph increased temperatures lead the peak to
Lower and shift to right
Enthalpy of combustion is
Always exothermic and so value will be negative
Enthalpy change for a reaction
E products - E reactants
Bond Enthalpy is
The energy required to break one mole of bonds in a gas state, diatomic molecules are always like this
Mean bond Enthalpy is
An average value, bond strength measured in many different molecules and then averaged
At equilibrium the concentration is
Constant for both products and reactants
How do catalysts affect equilibrium
Catalysts don’t change position of equilibrium it’s just reached more quickly
LA CHATELLIERS PRINCIPAL: add reactant
Equilibrium shifts to right (more product)
LA CHATELLIERS PRINCIPAL: adding product
Equilibrium shits to left (more reactant)
LA CHATELLIERS PRINCIPAL: increase pressure
Equilibrium shifts to side with less pressure (less moles of gas)
LA CHATELLIERS PRINCIPAL: decrease pressure
Equilibrium shifts to side with higher pressure (more moles of gas)
LA CHATELLIERS PRINCIPAL: increase temperature
Equilibrium shifts to endothermic side
LA CHATELLIERS PRINCIPAL: decrease temperature
Equilibrium shifts to exothermic side
