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RideAnS [48]
3 years ago
10

The graph below illustrates a change in energy during a phase change.

Chemistry
2 answers:
-BARSIC- [3]3 years ago
6 0

Answer:

B. This is an exothermic reaction that involves freezing.

vagabundo [1.1K]3 years ago
3 0

Answer:

Endothermic. Endothermic phase changes take in heat from the surrounding environment; they include melting, sublimation and boiling. ... For example, the forces that hold iron atoms together are strong, so it takes high temperatures to melt iron.

Explanation:

You might be interested in
What volume of 0.175 m na3po4 solution is necessary to completely react with 95.4 ml of 0.102 m cucl2?
VARVARA [1.3K]

 The  volume  of 0.175 M   Na3PO4   solution    that is necessary  to completely  react  withn   95.4 ml  of  0.102 M  cuCl2  is


<u>calculation</u>

<u>  </u><em> Step 1: </em> write  the equation for reaction

3CuCl2 (aq)  + 2Na3Po4 →  Cu3(PO4)2  + 6 NaCl

Step 2 : find the  moles  of CuCl2

moles  =  molarity  x  volume in liters

 volume in liters  =  95.4  /1000 =0.0954 L

moles  is therefore = 0.0954 L  x  0.102 M= 0.00973 moles


Step : use the mole  ratio to calculate  the  moles of Na3Po4

The mole ratio  of  CuCl2 : Na3PO4  is 3:2  therefore  = 0.00973 x2/3= 0.00649  moles


Step  4 :   find  the volume of  Na3PO4

volume  = moles/molarity

= 0.00649 mole /  0.175=0.037 M

5 0
4 years ago
The mass of helium gas in a balloon is_?
Kobotan [32]

Answer:

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Explanation:

5 0
4 years ago
Li + H2O + LiOH + H2<br> How do I balance this?
umka2103 [35]

Answer:

2Li + 2H2O → 2LiOH + H2

Explanation:

Lithium + Water = Lithium Hydroxide + Dihydrogen

6 0
3 years ago
Why is water considered "sticky"? What does that mean?
dmitriy555 [2]

Answer:

Explanation:

Ya que las cargas eléctricas opuestas se atraen, las moléculas de agua tienden a atraerse unas a otras, haciendo el agua "pegajosa," como lo muestra el diagrama del lado derecho. Cuando las moléculas de agua se atraen unas a otras, se unen. Esta es la razón del porqué se forman las gotas

8 0
3 years ago
Read 2 more answers
Is the answer correct?
poizon [28]
Yes, it is correct...........
3 0
3 years ago
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