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3 years ago

Which statement explains why low temperature and high pressure are required to liquefy chlorine gas?

Chemistry

2 answers:

Yanka [14]3 years ago

6 0

Answer: (3) Chlorine molecules have weak intermolecular forces of attraction.

Explanation: In order to liquefy a gas, the molecules must be brought closer. Chlorine being a gas has weak inter molecular forces of attraction and the molecules are far away from each other.

Thus decreasing the temperature would decrease the kinetic energy of the molecules and increase in pressure would bring the molecules close together to convert it into liquid phase.

Leona [35]3 years ago

3 0

4 is correct. Since gases are made of rapidly moving molecules with a relatively high amount of kinetic energy, the molecules have a hard time coming together to form a liquid. You must lower their kinetic energy with a low temperature and force the molecules together with high pressure.

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Which term describes the weather in an area over a long period of time?

3241004551 [841]

Answer:

climate

Explanation:

causes it happens over a long period of time

6 0

3 years ago

Automobile airbags contain solid sodium azide, NaN3, that reacts to produce nitrogen gas when heated, thus inflating the bag. 2N

Vitek1552 [10]

Answer : The value of work done for the system is 1144.69 J

Explanation :

First we have to calculate the moles of $NaN_3$

$\text{Moles of }NaN_3=\frac{\text{Mass of }NaN_3}{\text{Molar mass of }NaN_3}$

Molar mass of $NaN_3$ = 65.01 g/mole

$\text{Moles of }NaN_3=\frac{20.2g}{65.01g/mole}=0.311mole$

Now we have to calculate the moles of nitrogen gas.

The balanced chemical reaction is,

$2NaN_3(s)\rightarrow 2Na(s)+3N_2(g)$

From the balanced reaction we conclude that

As, 2 mole of $NaN_3$ react to give 3 mole of $N_2$

So, 0.311 moles of $NaN_3$ react to give $\frac{0.311}{2}\times 3=0.466$ moles of $N_2$

Now we have to calculate the volume of nitrogen gas.

Using ideal gas equation:

$PV=nRT$

where,

P = Pressure of $N_2$ gas = 1.00 atm

V = Volume of $N_2$ gas = ?

n = number of moles $N_2$ = 0.466 mole

R = Gas constant = $0.0821L.atm/mol.K$

T = Temperature of $N_2$ gas = $22^oC=273+22=295K$

Putting values in above equation, we get:

$1.00atm\times V=0.466mole\times (0.0821L.atm/mol.K)\times 295K$

$V=11.3L$

As initially no nitrogen was present. So,

Volume expanded = Volume of nitrogen evolved

Thus,

Expansion work = Pressure × Volume

Expansion work = 1.00 atm × 11.3 L

Expansion work = 11.3 L.atm

Conversion used : (1 L.atm = 101.3 J)

Expansion work = 11.3 × 101.3 = 1144.69 J

Therefore, the value of work done for the system is 1144.69 J

5 0

3 years ago

How is light energy converted to chemical energy?

ipn [44]

Answer:

Photosynthesis is the process in which light energy is converted to chemical energy in the form of sugars. In a process driven by light energy, glucose molecules (or other sugars) are constructed from water and carbon dioxide, and oxygen is released as a byproduct.

Explanation:

3 0

3 years ago

Read 2 more answers

What is the wavelength of these waves?

Pepsi [2]

It measure the distance between two consecutive waves within the phase.

3 0

3 years ago

Which of the following atoms contains the same number of neutrons as an atom of Calcium-40? (2 points) Select one: a. Potassium-

SVEN [57.7K]

First, let's find the number of neutrons in Calcium-40. to find the number of neutrons, you need to take the atomic mass minus atomic number

neutrons in Calcium---> 40 - 20 (atomic number) = 20 neutrons

potassium-40---> 40- 19= 21
scandium-44----> 44- 21= 23
argon-38---------> 38- 18= 20
chlorine-36------> 36- 17= 19

the answer is argon-38

5 0

4 years ago

Read 2 more answers