Which process is accompanied by a decrease in entropy?(1) boiling of water(2) condensing of water vapor(3) subliming of iodine(4) melting of ice
Answers
Answer:
2) condensing of water vapor
Explanation:
Entropy is the measure of disorder in a system. Disorder means how "separated" and distanced the molecules, particles, etc. are from each other. Solids and crystals have rigid structures meaning that they have less disorder than gases and liquids that have free structures. Gases and liquids have a higher disorder than solids and crystalline structures. An increase in entropy means that the disorder is increasing; more heat and energy are being added. A decrease in entropy means that the disorder is decreasing and the structure becomes more rigid and ordered; less heat and energy are being added. So the condensing of water vapor means that disorder is decreasing, thus the entropy is decreasing.
I hope this makes sense :)
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Answers
Answers
Answer:
The time saved on a ten mile trip by traveling at 60 mph instead of 55 mph is 54 seconds
Explanation:
Velocity is a physical quantity that expresses the relationship between the space traveled by an object, the time used for it and its direction. So velocity is the change in position of a body over time:
The mile per hour (mph) is a unit of speed measurement that expresses the number of international miles traveled per hour.
From the definition of speed it can be deduced that the time it takes to travel a certain distance at a constant velocity is:
velocity*time=position
Then, if the position is 10 miles and the velocity is 55 mph:
time=0.1818 hours
If 1 hour is 60 minutes, the time can be expressed as:
time=0.1818 hours*60 minutes= 10.90 minutes
The position is now constant at 10 miles, but the speed is 60 mph. So the time it takes to travel that distance at that speed is:
time=0.166 hours
If 1 hour is 60 minutes, the time can be expressed as:
time=0.166 hours*60 minutes= 10 minutes
To calculate the time you will save, the subtraction of both times obtained is performed:
10.9 minutes - 10 minutes= 0.9 minutes
If 1 minute is 60 seconds, the time can be expressed as:
0.9 minutes*60 seconds= 54 seconds
The time saved on a ten mile trip by traveling at 60 mph instead of 55 mph is 54 seconds
Time = Distance/Rate
for 60 mph
Time = 10 miles/60 mph
= 0.1666 * 60 minutes = 10 minutes
for 55 mph
Time = 10 miles/55 mph
= 0.181818 * 60 minutes = 10.90 minutes
A
Which model is composed of rapidly moving particles?
B.
Which model is composed of particles vibrating in place?
C
Which model is composed of electrically charged particles?
Which model is composed of particles sliding past each other?
Answers
Answer:
C Which model is composed of electrically charged particles?
Explanation:
The best question to resolve and determine the model which is plasma is to find one that is composed of electrically charged particles.
Plasma is one of the states of matter which is characterized by ions and other charged particles.
Matter is anything that has weight and occupies space.
There are four known states of matter which are:
- Solid
- Liquid
- Gas
- Plasma
Plasma is the only state of matter made up of charged particles.
b. shale
c. magma
d. silt
Answers
Limestone is a sedimentary rock. It was formed from small rock or stone particles that have been compacted by pressure. It can be formed either by evaporation or with the help of living organisms.
Calcium carbonate in seawater are used by ocean-dwelling organisms to create their shells and bones; like corals, clams, oysters. When these organism die, their shells and bones are broken down by the waves and settle on the ocean floor where the pressure of the ocean water drives these sediments together to create limestone.
Limestone is created through evaporation. When water containing calcium carbonate evaporates it leaves behind the sediment deposit which in turn becomes limestone after being subjected to the water pressure.
Answer:
Awnser is A
Explanation: just took the test
a. 1.07 x 10^-1 atoms
b. 6.47 x 10^2 atoms
c. 3.35 x 10^22 atoms
d. 3.61 x 10^24 atoms
8. How many atoms are present in 2.0 x 10^6 mol of carbon?
a. 3.3 x 10^-18 atoms
b. 4.0 x 10^-17 atoms
c. 1.0 x 10^29 atoms
d. 1.2 x 10^30 atoms
9. what mass is present in sample of AgNO3 containing 3.14 x 10^19 formula units?
a. 5.21 x 10^-5 g
b. 8.86 x 10^-3 g
c. 1.13 x 10^2 g
d. 1.92 x 10^4 g
10. How many molecules are present in 36.6 L of SO2 gas at STP?
a. 1.36 x 10^-21 molecules
b. 1.63 x 10^0 molecules
c. 1.54 x 10^22 molecules
d. 9.84 x 10^23 molecules
Answers
7) C
8) D
9) B
10) D
The decimal difference in my calculations may be due to my rounding off or my use of the exact values in some cases.
Note: Mr - Molar Mass
L - Avogadro's Constant
b) a period of time when temperatures across the planet are colder than normal
c) a characteristic of summer that returns seasonally
d) the gain of heat in coastal areas from El Niño storms
Answers
Global Warming is a gradual increase in the overall temperature of the earth's atmosphere.
So, i believe the answer to your question would be a) a recent increase in the average global temperatures near Earth's surface
a
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