Topic 7 Equilibrium Flashcards
(12 cards)
What is a closed system?
A system in which neither matter nor energy can be lost or gained
What is the Contact process?
The synthesis of sulphuric acid, where V2O5 is used as a catalyst
Define equilibrium constant for the reaction aA + bB ⇌ cC + dD
[C]c[D]d/[A]a[B]b
What is dynamic equilibrium?
An equilibrium in which the rates of the forward and reverse reactions are the same
What is the Haber process?
The synthesis of ammonia, where Fe is used as a catalyst
What is the optimum temperature for exothermic reactions like the Haber process?
The best compromise between yield and rate
What is a homogeneous reaction?
A reaction in which all the species involved are in the same phase
State Le Chatelier’s principle
If an equilibrium is subjected to a stress, the equilibrium will shift to minimize the effect of the stress
What is phase equilibrium?
When the rate of vaporization is equal to the rate of condensation
Define vapor pressure
The partial pressure of a vapor
When does boiling occur in relation to vapor pressure?
When a liquid’s vapor pressure equals the external pressure
What effect do stronger intermolecular forces have on vapor pressure?
The stronger the intermolecular forces, the lower the vapor pressure at a particular temperature
