Unit 3 Flashcards
What Is The Formula For Atom Economy ?
Desired/Total X 100
What Is The Formula For Percentage Yield ?
Actual/Theoretical X 100
What Is The Formula For Enthalpy Change ?
Total Bonds Broken + Total Bonds Made
What Is Bond Enthalpy ?
bond enthalpy is where new substances are made in a chemical reaction.
How Can You Estimate The Enthalpy Change For The Gaseous Phases Reactants ?
By using bond enthalpy values which are in the data book
What Is Molar Bond Enthalpy ?
It is the energy required to break 1 mole of bonds in a diatomic molecule in the gaseous state
What Does Atom Economy Measure ?
It measures the proportion of the total mass of all starting materials converted into the desired products
In a reversible reaction how many reactions will be endothermic and how many will be exothermic ?
one will be endothermic and one will be exothermic
What will a drop in temperature do to the equilibrium ?
it will move to the side with the side that releases heat
what will a drop in pressure do to the equilibrium ?
it will favour the side with the most moles
what is molar volume ?
it is the volume occupied by one of any gas at a certain temperature and pressure. molar volume is the same for all gases at the same temperature and pressure
what does adding a catalyst do to the equilibrium ?
it lowers the activation energy for both the forward and reverse reactions and increases the speed for both to the same extent
what is chromatography ?
it is a technique used by scientists to split up different compounds that have different solubility’s. the more soluble the compound the farther it will travel.
The paper is the stationary phases
The solvent is the mobility phase
