Unit 5 - thermodynamics

standard enthalpy of an element is...

H2(g) + 0.5O2(g)--> H20(l)
what is this an example of?

the standard enthalpy of atomisation is...

Mg(s) -->Mg(g)
is an example of...

definition of first ionisation energy...

Na(g) --> Na+(g) + e-
is an example of...

definition of second ionisation energy

Na+(g) --> Na2+(g) + e-
is an example of..

O(g) + e- ---> O-(g)
is an example of

definition of lattice formation enthalpy is...

O-(g) + e- --> O2- (g) is an example of

Na+(g) + Cl-(g) --> NaCl(s) is a definition of

(Na+) + aq --> Na+ (aq)
is an example of

definition on the enthalpy of solution is...

NaCl(s) + aq --> Na+(aq) + Cl-(aq)

is an example of

definition of mean bond enthalpy

standards conditions =

ionic bonding is between

the metal ions in ionic compounds are...

the non-metal ions in an ionic compound are..

Hess's law states

Born - Haber cycle is

A born-haber cycle starts with

draw the born haber cycle for NaCl

draw the born haber cycle for MgCl when we know
1. delta Hf = -641kJmol-1
2. delta H at (Mg) = +148 kJmol-1
3. first IE (Mg) = +738Kjmol-1
4. second IE (Mg) = +1451 Kjmol-1
5. atomisation of Cl = +122Kjmol-1
6. first EA of Cl = -349kJmol-1
7. lattice formation = -2524kJmol-1

all first electron affinities of all element are negative because...

looking at the trends in lattice energy, a larger ion means...

why does a larger ion lead to a smaller lattice enthalpy...

the lattice enthalpy increases with the size of the charge, why?

negative delta H is a clue as to whether a reaction is

gases are more ..... than liquids

the randomness of a system is called

is the particles of the products is more disordered than the reactants then the entropy change is...

what has a larger entropy, liquids, gases, or solids?

units of entropy are

the entropy change for a reaction can be calculated by

what are the two factors that dictate whether a reaction is feasible?

is delta G = negative this means?

if delta G = positive this means?

gibbs depends on temperature therefore

when delta G = 0
what does this mean?

enthalpy and entropy tell us nothing about the rate of the reaction.. why?

delta S is