Flashcards on Unit 5 - thermodynamics, created by jasmin.sahota on 06/14/2013.
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Created by jasmin.sahota
almost 11 years ago
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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
