Thermodynamics (4)

Question 1

why do substances with high chemical potential spontaneousy change ?

Answer 1

1. high enthalpy thefore have large capcaity to do work by warming the surroundings
2. ….as a result they have low enthalpy thefore it has large capacity to do work by gainign entropy during reactions were entropy increases

Question 2

what does chemical potentila measure ?

Answer 2

the capacity of a system to do useful work

Question 3

whta is free energy ?

Answer 3

what remains of chemical potential after bring used up in a system

Question 4

what is chemical potential called at constant pressure ?

Answer 4

Gibbs free energy
(G)

Question 5

substances with high free energy….

Answer 5

have high enthalpy (lots to loose)
and
high entropy (lots to gain)

Question 6

Gibbs free energy
equation

Answer 6

G= H - TS

Question 7

how much useful energy is produced at high temperatures and why?

Answer 7

there is less useful work because heat is a chaotic form of energy

Question 8

how do you predict spontaneous reaction ?

Answer 8

when G is less than 0

Question 9

what is temperature measured in in free energy

Answer 9

in kelvin = C+273

Question 10

what is enthalpy measured in ?

Answer 10

kJ mole-1

Question 11

what is entropy measured in ?

Answer 11

J K-1 mole-1
be mindful of KILO