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Lyrx [107]
3 years ago
14

Is a instant cold pack Endothermic or Exothermic reaction? Explain.

Chemistry
1 answer:
marshall27 [118]3 years ago
3 0

Answer:

Yes an instant cold pack is a perfect example of an endothermic reaction.

Explanation:

They are endothermic because they absorb heat energy from their surroundings. This means that the surroundings of endothermic reactions are colder as a result of the reaction.For example melting ice is a type of this reaction

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According to Le Châtelier's principle, what happens if heat is added to a system? apex
anzhelika [568]

Explanation:

Le Chatelier's principle states that for a long period of time if a system is at equilibrium and it is subjected to change in concentration, temperature, volume or pressure then the system shifts to a new equilibrium.

This change will partly counter acts the applied change.

Therefore, when heat is added to the system then equilibrium will shift to the side where temperature or heat is reduced again.

For example,    A + 2B \leftrightharpoons C + D      

Since heat is added to the system, hence, system will shift to the left side or we can say equilibrium will shift to the backward direction.

4 0
4 years ago
Read 2 more answers
What gas is formed when magnesium reacts with hydrochloric acid?
PolarNik [594]
Hydrogen gas is formed when magnesium reacts with hydrochloric acid.
7 0
4 years ago
A mixture that results when substances dissolve to form a homogeneous mixture
MrRa [10]
A mixture that results when substances dissolve to form a homogeneous mixture is a solution.
3 0
3 years ago
How many molecules are in 28 grams of nitrogen gas in balloons?
melomori [17]

Answer:

6.022\cdot 10^{23} molecules of nitrogen gas

Explanation:

In order to convert the mass of a given compound into the number of molecules, we need to:

  • identify the number of moles of a given compound dividing its mass by the molar mass, n = \frac{m}{M},
  • multiply the number of moles by the Avogadro's constant which tells us that 1 mole contains N_A = 6.022\cdot 10^{23} molecules.

In this problem:

m_{N_2} = 28~g

M_{N_2} = 28.01~g/mol

The number of particles is then found by:

N_{N_2} = n_{N_2}\cdot N_A = \frac{m_{N_2}}{M_{N_2}} N_A = \frac{28 g}{28.01 g/mol}\cdot 6.022\cdot 10^{23} mol^{-1} = 6.022\cdot 10^{23}

6 0
4 years ago
4. At least one carbon-carbon bond in an alkyne is a triple covalent bond. Other bonds may be single or double carbon-carbon bon
DanielleElmas [232]

Answer:

hope it helps cuz i did not really understand

3 0
2 years ago
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