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garik1379 [7]
3 years ago
7

What must happen for liquid water to become water vapor?

Chemistry
2 answers:
Maurinko [17]3 years ago
5 0

C. The water molecules must gain kinetic energy.


Wittaler [7]3 years ago
5 0

Answer: Option (C) is the correct answer.

Explanation:

When liquid water is heated then molecules of water absorb heat and due to this vibration between water molecules increase to greater extent. As a result, kinetic energy of water molecules also increases.

Therefore, water starts to evaporate as the temperature reaches at 100 degree Celsius.

Thus, we can conclude that the water molecules must gain kinetic energy for liquid water to become water vapor.

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Catalysts increase reaction rates by lowering the activation energy of a reaction.
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Read 2 more answers
A 40.2 g sample of a metal heated to 99.3°C is placed into a calorimeter containing 120 g of water at 21.8°C. The final temper
aliina [53]

Answer:

B) Iron (c=0.45 J/g°C)

Explanation:

Given that:-

Heat gain by water = Heat lost by metal

Thus,  

m_{water}\times C_{water}\times (T_f-T_i)=-m_{metal}\times C_{metal}\times (T_f-T_i)

Where, negative sign signifies heat loss

Or,  

m_{water}\times C_{water}\times (T_f-T_i)=m_{metal}\times C_{metal}\times (T_i-T_f)

For water:

Mass = 120 g

Initial temperature = 21.8 °C

Final temperature = 24.5 °C

Specific heat of water = 4.184 J/g°C

For metal:

Mass = 40.2 g

Initial temperature = 99.3 °C

Final temperature = 24.5 °C

Specific heat of metal = ?

So,  

120\times 4.184\times (24.5-21.8)=40.2\times C_{metal}\times (99.3-24.5)

40.2C_{metal}\left(99.3-24.5\right)=120\times \:2.7\times \:4.184

40.2C_{metal}\left(99.3-24.5\right)=1355.616

C_{metal}=0.45\ J/g^0C

<u>This value corresponds to iron. Thus answer is B.</u>

3 0
3 years ago
In Humans, the liquid waste
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The answer is b (bladder)
8 0
3 years ago
How many grams of H2Oare produced when 5.38g of O2<br> is reacted?
likoan [24]

Answer:

I think this answer should be 2.33 g H2O

6 0
3 years ago
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