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olga_2 [115]
3 years ago
12

Project: Modeling Energy Changes

Chemistry
1 answer:
ExtremeBDS [4]3 years ago
7 0

Answer:

A Chemical reaction involves changes in energy in the form of absorbtion and release of heat due to the formation and breakdown of chemical bonds. A chemical reaction is categoried as endothermic reaction in which heat energy is take in or absorbed and exothermic reaction in which energy is released.

<u>A model can be created by following below details:</u>

  • Take a beaker and put 10 milliliters of vinegar in it.
  • Place a thermometer in the beaker and measure the initial temperature.
  • Then add half teaspoon of baking soda, that results into decreasing in the temperature.

So, the decrease in temperature shows it is an endothermic reaction in which heat energy is absorbed.

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The symbol Na represents a sodium atom that has lost an electron. True False
IgorLugansk [536]
False.
Na does represent sodium, but NOT when it lost an electron. Na+ represents sdoium when it lost its electron.

3 0
3 years ago
When an atom gains an electron, the resulting particle is calledA) a proton.B) an anion.C) a cation.D) an isotope.E) none of the
MAVERICK [17]

Answer:

B) an anion

Explanation:

During bonding atoms may share electron or give out electron . In the case of electrovalent or ionic bonding, electron(s) is/are transferred from one atom to another . The atom that donate the electron are known as donor atom and the atom that receives the electron are known as receivers.

The atom that donate the electron becomes a cation(positively charged) as it lose it electron(s) while the receiver gains electron to become an anion which is a negatively charge ion.  

An example of such interaction is between a sodium atom and a chlorine atom.  The Na atom lose it electron to become positively charged(cation) while the chlorine atom gains electron to become negatively charged(anion). Both atom bond together losing and gaining electron to fulfill the octet rule.

Na+  +  Cl-   → NaCl

5 0
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(Someone please help!)
ElenaW [278]

Answer:

COLORS

Explanation:

i looked it up lol

5 0
2 years ago
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Balanced equation for the neutralization of these 2. HCl , Ca(OH)2
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Balanced equation:

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</span>
hope this helps!


5 0
3 years ago
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Decrease

Increase  

Increase

Decrease

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