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4 years ago

If enought heat was removed from water. What will it change into and why

Chemistry

2 answers:

Savatey [412]4 years ago

7 0

If enought heat was removed by water, its will probably evaporate or turn into steam.

Juliette [100K]4 years ago

7 0

Hello!

If enough heat was removed from water, it would become a solid.

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A student carried heated a 25.00 g piece of aluminum to a temperature of 100°C, and placed it in 100.00 g of water, initially at

lawyer [7]

Answer: The final temperature of the system is 14.60°C

Explanation:

When metal is dipped in water, the amount of heat released by metal will be equal to the amount of heat absorbed by water.

$Heat_{\text{absorbed}}=Heat_{\text{released}}$

The equation used to calculate heat released or absorbed follows:

$Q=m\times c\times \Delta T=m\times c\times (T_{final}-T_{initial})$

$m_1\times c_1\times (T_{final}-T_1)=-[m_2\times c_2\times (T_{final}-T_2)]$ ......(1)

where,

q = heat absorbed or released

$m_1$ = mass of aluminium = 25.00 g

$m_2$ = mass of water = 100 g

$T_{final}$ = final temperature = ?°C

$T_1$ = initial temperature of aluminium = 100°C

$T_2$ = initial temperature of water = 10°C

$c_1$ = specific heat of aluminium = 0.900 J/g°C

$c_2$ = specific heat of water= 4.18 J/g°C

Putting values in equation 1, we get:

$25\times 0.900\times (T_{final}-100)=-[100\times 4.18\times (T_{final}-10)]$

$T_{final}=14.60^oC$

Hence, the final temperature of the system is 14.60°C

3 0

3 years ago

Which of these gives a correct trend in ionization energy

natita [175]

Answer:

C. I, III , IV

Explanation:

As we move from left to right across the periodic table the number of valance electrons in an atom increase. The atomic size tend to decrease in same period of periodic table because the electrons are added with in the same shell. When the electron are added, at the same time protons are also added in the nucleus. The positive charge is going to increase and this charge is greater in effect than the charge of electrons. This effect lead to the greater nuclear attraction. The electrons are pull towards the nucleus and valance shell get closer to the nucleus. As a result of this greater nuclear attraction atomic radius decreases and ionization energy increases because it is very difficult to remove the electron from atom and more energy is required.

As we move down the group atomic radii increased with increase of atomic number. The addition of electron in next level cause the atomic radii to increased. The hold of nucleus on valance shell become weaker because of shielding of electrons thus size of atom increased.

As the size of atom increases the ionization energy from top to bottom also decreases because it becomes easier to remove the electron because of less nuclear attraction and as more electrons are added the outer electrons becomes more shielded and away from nucleus.

3 0

3 years ago

Please helpp neep asap ik its late at night but i just need this one page and i can rest

stich3 [128]

Answer:

15. Velocity = 3 X 10^8

Distance = 1580 m

time = distance / velocity

t = 1580 / 3 * 10^8

t = 1580 * 10^-8 / 3

t = 158 * 10^-7/3

t = 5.26 * 10^-8 seconds

16. Converting the distance to 'm'

Given distance (in miles), multiplying by 1.609 to convert to km and also multiplying by 1000 to convert to 'm'

s= 4.8 * 1.609 * 10^7 * 1000

v = 3 * 10^8

t = 4.8 * 1609 * 10^7 / 3 * 10^8

t = 1.6 * 1609 * 10^-1

t = 2574.4 * 10^ -1

t = 2.5744 * 10^-4 s

17. Mass in 1 tsp of medicine = 5 mL at a density of 25 mg/mL

Mass in 1 tsp of medicine = 5 * 25 = 125 mg

Mass prescribed by the doctor = 375 mg

Number of table spoons required = Mass prescribed / Mass in 1 tsp

N = 375/125 = 3 table spoons of the medicine

18. Density of medicine = 400g/ 5mL = 80g / mL

Medicine required = 1500 g

Volume of medicine required = Medicine Required / Density of medicine

Volume = 1500 / 80 = 18.75 mL of medicine is required

Hence, the volume of the suspension should be at least 18.75 mL

19. Volume of 10 drops = 1 mL

Volume of 5 drops = 1/2 mL

The faucet is leaking 5 drops or 1/2 mL water per minute

Number of minutes in a day = 60 * 24 = 1440 minutes in a day

Water leaked in 1440 minutes = 1440 * 1/2 = 720

0.720 L (720 mL) Water leaked from the faucet in a day

Kindly mark Brainliest, Thanks

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4 years ago

How is the ocean important to human survival? restate the question

Aneli [31]

Answer:

How is the ocean important to human survival? The air we breathe: The ocean produces over half of the world's oxygen and absorbs 50 times more carbon dioxide than our atmosphere. Climate regulation: Covering 70 percent of the Earth's surface, the ocean transports heat from the equator to the poles, regulating our climate and weather patterns

Explanation:

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3 years ago

True/False 1. A compound makes up an atom Explain

lana [24]

Answer: True

Explanation: The answer is true because A compound is a molecule made of atoms from different elements. All compounds are molecules, but not all molecules are compounds. … There are two main types of chemical bonds that hold atoms together: covalent and ionic/electrovalent bonds. Atoms that share electrons in a chemical bond have covalent bonds.

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2 years ago