some special tings Flashcards
if a reaction is self sustaining
delta H > activation energy
define activation energy
Activation energy is the MINIMUM energy required by reactants to undergo a chemical reaction
formula of ethanol?
C2H6O
is freezing of ice exothermic or endothermic
exothermic, since bonds are formed, energy is released
what is the role of a salt bridge?
The salt bridge completes the circuit in a galvanic cell. It allows movement of ions between solutions to maintain electrical neutrality in each half-cell.
why does copper’s electron configuration end in 4s1?
because d orbitals are more stable half full or completely full than any other configuration
what must you remember when writing down your final answer for molar heat of combustion?
negative for exo and positive for endo
what must you do while conducting heat released qs?
must be one mol of the substance
or do your balanced equation and divide it so that one mol of significant substances remains
what must a salt bridge be?
saturated solution where both cation and anion are soluble
role of a heterogenous catalyst
a heterogenous catalyst is a catalyst that is in a different state from the reactants that provides a surface for reactant particles to adsorb onto so that they gain the correct orientation. This increases proportion of collisions and increases rate of reaction.
list intermolecular forces
dispersion, dipole dipole, hydrogen bonding
list intramolecular force
ionic, metallic, covalent lattice and covalent molecular
when doing hess’ law questions remember to ?
use sigma in your working
READ THE QUESTION
NO IM SERIOUS READ THE qUESTUION OK
what is net ionic equation
when there are no spectator ions in the equation
