W6 Flashcards
1
Q
What is vaporisation
A
Requires energy input to make a change and so is endothermic
2
Q
What is fusion
A
Melting, also endo and requires energy
3
Q
Condensation and freezing
A
Opposite to vaporisation and fusion and so release energy and are exothermic
4
Q
Sublimination equation
A
△Hsub = △Hfus + △Hvap
5
Q
Gibs molar energy equation
A
Gm = G/N
△G = sum of nGm(products) - sum of nGm(reactants)
When a sub changes from L to G
6
Q
What is critical T
A
Point where phase boundary is no longer observed
7
Q
Differential scanning calomitery
A
Sample heated in Al pan adn heat change is noted as a function of temp
8
Q
What does a negative free energy value show
A
Spontaneous
