WEEK8

Question 1

What is one way to determine if a reaction is going from order to disorder?(1)

Answer 1

By the number of moles. If there are more moles of the product than the reactants

Question 2

What is one way to determine if a reaction is going from order to disorder?(2)

Answer 2

Increasing your temperature. Higher the temperature the more energy the molecules have because of this this they jump around more

Question 3

What is one way to determine if a reaction is going from order to disorder?(3)

Answer 3

Change of states. Solid to Liquid to Gas

Question 4

What is one way to determine if a reaction is going from order to disorder?(4)

Answer 4

If solid dissolves in a liquid. Breaks into cations and anions

Question 5

What is one way to determine if a reaction is going from order to disorder?(5)

Answer 5

Gas dissolved in liquid to gas dissolved in atmosphere

Question 6

What is the direction of a spontaneous process?

Answer 6

Spontaneous processes tend to proceed from states of low probability to higher probability

Question 7

What quantity does thermodynamics define?

Answer 7

Entropy(S)=kInW
W=# of ways of dispersing a fixed amount of energy
K=1.380.65 x 10^-23JK^-1

Question 8

What is the most practical way to determine (S)?

Answer 8

Change in (S)J mol^-1 K^-1=S()final-(S)initial

Question 9

what does the change in S tell us?

Answer 9

That any event accompanied by an increase in entropy of an isolated system has a tendency to occur spontaneously

Question 10

What factors affect entropy?

Answer 10

• Volume
• Temperature
• Physical state
• Number of particles

Question 11

What is the equation for the relationship between the entropy of the surroundings enthalpy of the system?

Answer 11

Change in Ssytem+change in -Hof system/T

Question 12

When is a reaction exothermic?

Answer 12

when heat is transferred from the system to its surroundings (delta H is negative)