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Igoryamba
3 years ago
9

Draw the change of state graph for water. Include temperatures on the y-axis and the name for each change of state

Chemistry
1 answer:
VikaD [51]3 years ago
3 0

Answer:

See below.  

Step-by-step explanation:

A typical heating curve for water looks like the diagram below.

It consists of five general areas.

  1. Warming of ice.
  2. Melting of ice. At 0 °C, ice and water are at equilibrium. If the water is cooling, the process is called <em>freezing</em>.
  3. Warming the water.
  4. Boiling of water. At 100 °C, water and steam are at equilibrium. If the steam is cooling, the process is called <em>condensation</em>.
  5. Heating the steam.

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The two samples will have the same density because they are the same substance. The volume will have increased just enough to balance the greater mass. Key Concept- When substances have the same volumes but different masses, the substance having the greatest mass will be the most dense.

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3 years ago
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mixas84 [53]

Answer :

Charles's Law : It is defined as the volume is directly proportional to the temperature of the gas at constant pressure and number of moles.

Mathematically,

V\propto T

                                Boiling water bath        Cool bath 1       Cool bath 2

Temperature (⁰C)                  99                              17                       2

Temperature (K)(T)    273+99=372             273+17=290      273+2=275

Volume of water                  0.0                             27.0                34.0

in cool flask (mL)

Volume of water=              135.8                           135.8               135.8

Air in flask (mL)

Volume of air                    135.8                           108.8               101.8

in cool flask (V)

\frac{V}{T}                                \frac{135.8}{372}=0.365             \frac{108.8}{290}=0.375         \frac{101.8}{275}=0.370

The graph volume versus temperature for a gas is shown below.

3 0
3 years ago
8.43g of CaCl2·2H2O is dissolved in 40.0g of H2O. What is the molality of the solution? (Note that the H2O in the CaCl2·2H2O mus
lara31 [8.8K]

Answer:

[CaCl₂·2H₂O] = 1.43 m

Explanation:

Molality is mol of solute / kg of solvent.

Mass of solvent = 40 g

Let's convert g to kg → 40 g / 1000 = 0.04 kg

Let's determine the moles of solute (mass / molar mass)

8.43 g / 146.98 g/mol = 0.057 mol

Molality = 0.057 mol / 0.04 kg → 1.43

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4 years ago
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