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Lisa [10]
3 years ago
14

What is Heat? What is Cold?

Chemistry
1 answer:
krok68 [10]3 years ago
6 0

Answer:

Heat is the process of something getting hot(temperatures going up). Cold is when something gets cold(temperature decreases).

Explanation:

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I wanted known how many of the reaction below is energy released
Tema [17]

Answer:

2

Explanation:

In two reactions energy is released.

1) C₆H₁₂O₆ + 6O₂    →    6H₂O + 6CO₂ + heat

It is cellular respiration reaction.It involves the breakdown of glucose molecule in the presence of oxygen to yield large amount of energy. Water and carbon dioxide are also produced as a byproduct.

Glucose + oxygen → carbon dioxide + water + 38ATP

2) 2H₂ + O₂   →    2H₂O  ΔH = -486 kj/mol

The given reaction is formation of water. In this reaction oxygen and hydrogen react to form water and 486 kj/mol is also released.

The reaction in which heat is released is called exothermic reaction.

Exothermic reaction:

The type of reactions in which energy is released are called exothermic reactions.

In this type of reaction energy needed to break the bonds are less than the energy released during the bond formation.

For example:

Chemical equation:

C + O₂   →  CO₂

ΔH = -393 Kj/mol

it can be written as,

C + O₂   →  CO₂ + 393 Kj/mol

Endothermic reactions:

The type of reactions in which energy is absorbed are called endothermic reactions.

In this type of reaction energy needed to break the bond are higher than the energy released during bond formation.

For example:

C + H₂O   →  CO  + H₂

ΔH = +131 kj/mol

it can be written as,

C +  H₂O  + 131 kj/mol  →  CO  + H₂

5 0
3 years ago
At the ph found in cells (about 7.0) what happens to the amino group on an amino acid
Andrew [12]
This means that the amino acid is neutral due to the pH equals 7
6 0
3 years ago
What solutions would you propose to a car manufacturer if its car rated poorly in a crash test? Please explain your answer.
scoundrel [369]

Answer:

fix the car better

Explanation:

3 0
3 years ago
Read 2 more answers
Calculate the pH of a solution of 0.0050M H2SO4.
Mice21 [21]
Calculate the Ag+ ion concentration in a saturated solution of Ag2CO3 Ksp=8.1X10^-12

Calculate the pH of a buffer solution that is 1.00 M CH3COOH (acetic acid) and 2.00 M CH3COONa (sodium acetate, a salt) Ka=1.8X-5

The mineral fluorite is composed of CAF2. The molar solubility of calcium fluoride in water is 2.1X106-4
moles/L. what is the Ksp of CaF2?

what ratio of benzoate ion to benzoic acid would be required to prepare a buffer with a pH of 7.20?
Ka(C6H5COOH)=6.5X10-5
4 0
3 years ago
What makes balancing redox reactions different from balancing other reactions?
sergejj [24]

Redox reactions are those <u>chemical reactions that involve the transfer of electrons between reactants</u>, altering the <em>oxidation state</em> of their elements.

In this type of reactions an element releases electrons that another element accepts, so there is a net transfer of charge.

When balancing redox reactions, not only must the chemical elements in the reactants and products be equalized (by the <em>law of conservation of the mass</em>), but also the charged that is transferred in the process must be balanced, since <u>the electrons that are lost in oxidation are the same as those that are gained in reduction (</u><em>law of conservation of charge:</em> <em>there is no destruction or net creation of electric charge</em>).

6 0
4 years ago
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