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3 years ago

What is it when a cup of ice turns to water

Chemistry

2 answers:

Licemer1 [7]3 years ago

7 0

Answer:

The freezing point is the temperature at which a liquid turns to a solid. ... This temperature is referred to as the melting point when temperatures rise above 32°F (0°C), causing ice to melt and change state from a solid to a liquid (water), as happened with the cup of crushed ice at room temperature.

Explanation:

timurjin [86]3 years ago

5 0

I don't really know what your question is asking so I am just going to list a few facts that I think might be what you are asking.

Ice turning into water is a physical change. The ice is undergoing the process of melting which does not change it chemically (ice and water are chemically identical in the sense that they are both composed of H₂O molecules) and the only difference between water and ice is that water molecules have a higher average amount of energy than the ice molecules do. When a substance melts, the molecules within the substance gain energy (in the form of heat) which allows them to break the intermolecular forces keeping them together. Since the melting of ice requires energy, the process is endothermic which means that the ice had to get energy from its surroundings and that water has more energy than ice does as a result of the process (ΔH is positive).

I hope that helps. Let me know in the comments if anything is unclear or if I did not answer your question.

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Name five solvents other than water

vovikov84 [41]

Answer:

Ethanol

Methanol

Acetone

Tetrachloroethylene

and Hexanes

Explanation:

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3 years ago

The process is taking place at constant temperature and pressure. then which of the following is true?

Black_prince [1.1K]

Answer: ΔH=TΔS

Both ΔH and TΔS are temperature dependent, where ΔH = TΔS. Because ΔG = ΔH − TΔS, at this temperature ΔG = 0, indicating that the liquid and vapor phases are in equilibrium.

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3 years ago

Water exist as a liquid between 0 and 100 Celsius.<br><br> a. True<br><br> b. False

adelina 88 [10]

True is the answer as at 100 Celsius water boils

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4 years ago

For the following reaction, 42.2 grams of potassium hydrogen sulfate are allowed to react with 21.4 grams of potassium hydroxide

ASHA 777 [7]

Answer:

53.99g

Explanation:

Step 1:

The balanced equation for the reaction. This is given below:

KHSO4(aq) + KOH(aq) —> K2SO4(aq) + H2O(l)

Step 2:

Determination of the masses of KHSO4 and KOH that reacted and the mass of K2SO4 produced from the balanced equation.

This is illustrated below:

Molar mass of KHSO4 = 39 + 1 + 32 + (16x4) = 136g/mol

Mass of KHSO4 from the balanced equation = 1 x 136 = 136g

Molar mass of KOH = 39 + 16 + 1 = 56g/mol

Mass of KOH from the balanced equation = 1 x 56 = 56g

Molar mass of K2SO4 = (39x2) + 32 + (16x4) = 174g/mol

Mass of K2SO4 from the balanced equation = 1 x 174 = 174g.

From the balanced equation above, 136g of KHSO4 reacted with 56g of KOH to produce 174g of K2SO4

Step 3:

Determination of the limiting reactant. This is illustrated below:

From the balanced equation above, 136g of KHSO4 reacted with 56g of KOH.

Therefore, 42.2g of KHSO4 will react with = (42.2 x 56)/136 = 17.38g of KOH.

From the above calculations, we can see that only 17.38g out of 21.4g of KOH given was needed to react completely with 42.2g of KHSO4.

Therefore, KHSO4 is the limiting reactant and KOH is the excess reactant.

Step 4:

Determination of the maximum mass of K2SO4 produced from the reaction.

In this case, the limiting reactant will be used as all of it is used up in the reaction. The limiting reactant is KHSO4 and the maximum amount of K2SO4 produced can be obtained as follow:

From the balanced equation above, 136g of KHSO4 reacted to produce 174g of K2SO4.

Therefore, 42.2g of KHSO4 will react to produce = (42.2 x 174)/136 = 53.99g of K2SO4.

Therefore, the maximum amount of K2SO4 produced is 53.99g.

8 0

3 years ago

As you move from left to right across the periodic table the number of valence electrons a. Increases b.stays the same c. Increa

Maslowich

The number of electrons in an atom is directly proportional to the number of protons, which is clearly represented by atomic number.

If you were to notate all of the electron configurations of the atoms in the 2nd row, you would clearly see an increase in the number of valence electrons from left to right.

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3 years ago