Chaos
A 1 gram sample of a substance has the greatest entropy when it is in the
A) solid state
B) liquid state
C) crystalline state
D) gaseous state
D - Gaseous State
What do plateaus on the heating curve represent?
Phase change - boiling, freezing, etc
Convert 56C to Kelvin
329
Convert 524K to Celsius
251
What phase of matter is aluminum in at 1500K?
liquid
Which reaction results in an increase in the entropy of the system?
a. gas --> liquid
b. liquid --> solid
c. liquid --> gas
d. gas --> liquid
C - liquid --> gas
Evaporation and melting are two examples of
A. endothermic processes
B. exothermic processes
A Endothermic
Convert -12C to Kelvin
261
Convert 13K to Celsius
-260
What phase of matter has the most tightly packed particles?
solid
As the randomness of a systems increases, what happens to entropy?
Increases
When temperature increases, what happens to kinetic energy?
Increases
How much heat energy does it take to completely melt 13grams of H2O at 0C?
4342J
A 12 grams sample of an unknown solid takes 2435J to heat. What is the heat of fusion?
202.9
Draw a diagram of neon at STP
Gas
As temperature decreases, what happens to entropy?
Decreases
Object A is 75C and object B is 110C. What is the direction of the heat flow?
B to A
How much heat energy does it take to boil 46grams of water at 100C?
103960
How much energy does it require to raise the temperature of a 17gram water sample 8C?
568.48
What phase change is deposition?
Gas --> solid
In terms of energy and entropy, systems in nature tend to go towards
A. High entropy, low energy
B. High entropy, high energy
C. Low entropy, high energy
D. Low entropy, low energy
A - High entropy, low energy
If a piece of metal that is 200K is placed in water and loses heat, what temperature was the water?
A. 215K
B 300K
C 0K
D -85C
-85
What is the total number of joules absorbed when 14grams of water is heated from 45 to 56C?
643.72
How many kilojoules are required to change 50grams of water at 100C to steam?
113
What is the melting point of antimony?
904