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4 years ago

Why does the temperature of heated water change when you increase the volume?

2 answers:

5 0

By heating the water the temperature of 0C to 4C, one can observe a decrease in its volume. In this temperature range, there is the phenomenon of anomalous thermal expansion of water.
The volume of water in the range of 0C to 4C decreases and 4C to 100C from growing. This anomalous behavior of water is associated with the fact that liquid water a temperature slightly above 0C, there are remnants of the loose structure of the ice. The temperature increase destroys this structure, allowing denser packing of the molecules. this is the reason behind this question

vitfil [10]4 years ago

3 0

By heating the water the temperature of 0C to 4C, one can observe a decrease in its volume. In this temperature range, there is the phenomenon of anomalous thermal expansion of water.
The volume of water in the range of 0C to 4C decreases and 4C to 100C from growing. This anomalous behavior of water is associated with the fact that liquid water a temperature slightly above 0C, there are remnants of the loose structure of the ice. The temperature increase destroys this structure, allowing denser packing of the molecules, and thus the volume of water decreases.

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What’s the solution?

emmasim [6.3K]

Answer:

See balanced equations below

Explanation:

1. Mg(s) +2 HCL (aq) →MgCl₂ (aq) +H₂(g)

This is a single replacement reaction, involving an acid with a metal

2. 2Al(s) + 3H₂SO₄ (aq)→Al₂(SO₄)₃(aq) + 3H₂

3. 3 Zn (s) + 2H₃PO₄(aq)→ Zn₃(PO₄)₂ (aq) + 3H₂ (g)

4. 2Al(s) + 6HCL (aq)→2AlCl₃(aq) +3H₂ (g)

1. 2KOH(aq) + MgCl₂→Mg(OH)₂ (aq) + 2KCl (aq)

2. 3NaOH (aq)+ Al(NO₃)₃ (aq)→Al(OH)₃(s) + 3 NaNO₃(aq) ---this is a precipitation reaction

3. BaBr₂(aq) + H₂SO₄→BaSO₄ (s) + 2Br⁻(aq)

4. Na₂S + 2HCl → 2NaCl (aq) + H₂S (g)

5. 3CaCl₂ +2K₃PO₄→ Ca₃(PO₄)₂+6KCl

6.Ba(NO₃)₂ + (NH₄)₂CO₃→ 2(NH₄)⁺(aq) +BaCO₃(s)

6 0

3 years ago

What causes hot air to rise, and cool air to sink?

nataly862011 [7]

Answer:

hot air rises because gases expand as they heat up.When air heats up and expands,its density also increases.The warmer,less dense air effectively floats on top of the colder, dense air below it. This creates a buoyant force that causes warmer air to rise.

cold air sinks because it is heavier as its more dense ( because of closely packed molecules) soits harder for them to move and they absorb less energy. Also, gravity pulls on it more strongly.

Hope it helps :)

8 0

3 years ago

It is desired to make 1.00 liter of 6.00 M nitric acid from concentrated 16.00 M HNO3.A) How many moles of nitric acid are in 1.

natima [27]

Answer:

A) 6.00 mol.

B) 0.375 L or 375 mL

C) 6.00 M

Explanation:

Hello,

A) In this case, from the definition of molarity, we compute the moles for the given volume and concentration:

$n=M*V=1.00L*6.00mol/L=6.00mol$

B) In this case, from the stock solution, the required volume is:

$V=\frac{6.00mol}{16.00mol/L}=0.375L$

C) In this case, we apply the following formula for dilution process:

$M_1V_1=M_2V_2$

Thus, solving for the final molarity, we obtain:

$M_2=\frac{M_1V_1}{V_2}=\frac{16.00M*0.375L}{1.00L}\\ \\M_2=6.00M$

Regards.

5 0

3 years ago

A 8.00g of a certain Compound X, known to be made of carbon, hydrogen and perhaps oxygen, and to have a molecular molar mass of

Ne4ueva [31]

Answer:

C3H6.

Explanation:

Data obtained from the question:

Mass of the compound = 8g

Mass of CO2 = 24.01g

Mass of H2O = 13.10g

Next, we shall determine the mass of C, H and O present in the compound. This is illustrated below:

Molar Mass of CO2 = 12 + (2x16) = 44g/mol

Molar Mass of H2O = (2x1) + 16 = 18g/mol

Mass of C in compound = Mass of C/Molar Mass of CO2 x 24.01

=> 12/44 x 24.01 = 6.5g

Mass of H in the compound = Mass of H/Molar Mass of H2O x 13.1

=> 2x1/18 x 13.1 = 1.5g

Mass of O in the compound = Mass of compound – (mass of C + Mass of H)

=> 8 – (6.5 + 1.5) = 0

Next, we shall determine the empirical formula of the compound. This is illustrated below:

C = 6.5g

H = 1.

Divide by their molar mass

C = 6.5/12 = 0.54

H = 1.4/1 = 1.

Divide by the smallest

C = 0.54/0.54 = 1

H = 1/0.54 = 2

Therefore, the empirical formula is CH2

Finally, we shall determine the molecular formula as follow:

The molecular formula of a compound is a multiple of the empirical formula.

Molecular formula = [CH2]n

[CH2]n = 44

[12 + (2x1)]n = 44

14n = 44

Divide both side by 14

n = 44/14

n = 3

Molecular formula = [CH2]n = [CH2]3 = C3H6

Therefore, the molecular formula of the compound is C3H6

4 0

4 years ago

Based on the chemical equation provided, use the drop-down menu to choose the coefficients that will balance the

WINSTONCH [101]

Answer:

2(H2) + 1(O2) = 2 (H2O) is the balanced equation

8 0

3 years ago