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ella [17]
3 years ago
15

When gases are released from a reaction what type of change has occurred?

Chemistry
2 answers:
umka21 [38]3 years ago
3 0

Answer:

Color Changes. A change in color often indicates a chemical change.

Temperature Changes. Changes in temperature might also indicate a chemical change has occurred.

Precipitates. The formation of a precipitate is a sign that a chemical change has occurred.

Light Emission.

Gas Production.

Explanation:

Lesechka [4]3 years ago
3 0

<u>Answer:</u>

<em>A chemical change has occurred. </em>

<em></em>

<u>Explanation:</u>

A chemical change is accompanied by a change in the chemical composition of the substance.

A color change, formation of a precipitate, evolution of a gas , temperature change are the indications of a chemical change.

For example  

2AlCl_3 (aq)+3Na_2 CO_3 (aq)>Al_2 (CO_3 )_3 (s)+6NaCl(aq)

Here we see the formation of a precipitate or an insoluble solid Al_2(CO_3 )_3 (s)

A chemical reaction is accompanied by a change in temperature.

Reaction in which heat is evolved is an exothermic reaction and reaction in which heat is absorbed is called as endothermic reaction.

Combustion reaction is an example in which heat and light is given off and it is exothermic.

Some reactions we see gas gets evolved. For example electrolysis of water produces Hydrogen and oxygen gas.

2H_2O>2H_2+O_2

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B

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Applying law of electrostatic which states that like charges repel each other and unlike charges attract each other

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At 500K, the equilibrium constant for the reaction N2O4D2NO2 is 1.5 x 10^3. What is the equilibrium constant for the reaction: 6
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Answer:

K = 2.96x10⁻¹⁰

Explanation:

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3 times this reaction:

3N2O4 ⇄ 6NO2; K = (1.5x10³)³ =3.375x10⁹

The inverse reaction has a K of:

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Which of the following statements is true of proteins?
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The answer is Denaturation is reversible

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