5.1.2 How Far - Definitions Flashcards
(12 cards)
What is a Catalyst?
A substance which speeds up the rate of a reaction without being used up
Define Concentration
The amount of a substance that is dissolved per unit volume of solution
What is an Endothermic reaction?
A reaction that takes in energy from the surroundings; the energy of the products is higher than that of the reactants
Define Equilibrium
The forward and reverse reactions of a process occur at exactly the same rate, meaning there is no overall change
What is the Equilibrium Constant (K)?
A value that relates the amount of products and reactants at equilibrium in a reversible reaction at a specific temperature
What is an Exothermic reaction?
A reaction that gives out energy into the surroundings; the energy of the reactants is higher than that of the products
Define Heterogeneous Equilibrium
An equilibrium reaction that involves substances in different states (solid, liquid, gaseous, or aqueous)
Define Homogeneous Equilibrium
An equilibrium reaction that involves substances all in the same state (solid, liquid, gaseous, or aqueous)
What is Kp?
The equilibrium constant equal to the partial pressures of the products raised to the power of their stoichiometric coefficients divided by the partial pressures of the reactants raised to the power of their stoichiometric coefficients
Define Mole Fraction (Xₐ)
Xₐ = nₐ / n, where Xₐ is the mole fraction of A, nₐ is the number of moles of A, and n is the total number of moles
What is Partial Pressure?
The pressure that would be exerted by one gas in a mixture if it occupied the container alone; Pₐ = P × Xₐ, where Pₐ is the partial pressure of A, P is the total pressure, and Xₐ is the mole fraction of A
What is Kc?
The equilibrium constant equal to the concentration of products raised to their stoichiometric coefficients divided by the concentration of reactants raised to their stoichiometric coefficients
