Font size
WorksheetsGENERAL CHEMISTRY 4TH Q W1
Total questions: 27
Worksheet time: 26mins
IT IS THE DISORDER IN A SYSTEM
(a)
A property of a process to
occur without an external
input of energy
(a)
a process that proceeds without external
input.
(a)
a process that requires energy to proceed.
(a)
what process is this:
melting of ice at 25°C
diffusion of gases
(a)
what process is this:
extraction of iron from its ore
(a)
a thermodynamic property
that describes energy
distribution in the microscopic
energy levels of a system
(a)
is denoted by S
(a)
higher entropy = ?
more disordered
less disordered
more random
less ordered
- denoted by w
- specific arrangement of particles in a system
(a)
More disordered state has the
lowest entropy
highest entropy
It is the name of the scientist who derived the mathematical relationship between entropy and the number of microstates in a system.
(a)
S is the ______, W is the _______
(a)
kB is the Boltzmann constant of what?
1.36×10−28 KJ
1.38×10−23 KJ
1.36×10−23 KJ
1.39×10−27 KJ
Process in which a solid is
transformed to a liquid
Solids have a more ordered
structure than liquids
(a)
Process in which a liquid is
transformed to a gas
(a)
Process in which a solid is
transformed to a gas
(a)
Process in which a solid is
transformed to mobile
ions/particles
(a)
Changes in entropy may be caused by:
change in temperature
phase change
change in pressure
chemical reaction
(a) in temperature Increase results in particles gaining more thermal
energy. More energy results in more ways to distribute energy to the different
microstates.
•increase in (a) results in increase in entropy
•more gaseous products = more disordered final state
To predict the entropy change of chemical reactions, count the gas
molecules in the reactant side and subtract it from the number of gas
molecules in the product side.
Δ ngas, reaction = ngas , product - ngas , reactant
Which of the ff are true?
If Δngas > 0, entropy is increased.
If Δngas < 0, entropy is decreased.
If Δngas > 0, entropy is decreased.
If Δngas < 0, entropy is increased.
States that all spontaneous processes produce
an increase in the entropy of the universe.
(a)
A. the universe tends to gravitate toward more
disorder
B. heat flows from warm to cold regions
C. gases diffuse to areas with high
concentration
D. there is perpetual engines
All letters are correct
Only C is incorrect
Only A and B are correct
Only C and B are correct
is denoted by the symbol g and a state function like entropy and enthalpy
(a)
measure of the available energy in a system to do
non-PV work
(a)
ΔG < 0 - exergonic (sp)
ΔG > 0 - endergonic (nsp)
ΔG = 0 - equilibrium
TRUE
FALSE
