CHEMISTRY HIGH SCHOOL

In an exothermic reaction, an increase in temperature favors the formation of products. a. True
b. False?

Answers

Answer 1
Answer: False, in an exothermic reaction, an increase in temperature does not favor the formation of products. Instead, it favors the backward reaction. An exothermic reaction is a reaction where energy is transferred from the system out to the environment.
Answer 2
Answer:

Answer:

The correct answer is option b.

Explanation:

Exothermic reactions are defined as the reactions in which energy of reactants is more than the energy of the products. In these reactions, energy is released by the system. The total enthalpy of the reaction (\Delta H) comes out to be negative.

In these reaction , products are favored when temperature is kept low. And when we allow these reaction to take place at higher temperature they favor reactant side.

Endothermic reactions are defined as the reactions in which energy of products is more than the energy of the reactants. In these reactions, energy is absorbed by the system. The total enthalpy of the reaction (\Delta H) comes out to be positive.

Related Questions

Which statement correctly describes the charge of the nucleus and the charge of the electron cloud of an atom?(1) The nucleus is positive and the electron cloud is positive.(2) The nucleus is positive and the electron cloud is negative.(3) The nucleus is negative and the electron cloud is positive.(4) The nucleus is negative and the electron cloud is negative.
Why is it that when a metal reacts with a nonmetal the reaction is always a Redox reaction?
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Which best describes a compound such as magnesium oxide?

In an oxidation-reduction reaction, the total number of electrons lost is(1) equal to the total number of electrons gained
(2) equal to the total number of protons gained
(3) less than the total number of electrons gained
(4) less than the total number of protons gained

Answers

Answer is: (1) equal to the total number of electrons gained.

In oxido-reduction reaction, at least one element lose and one element gain electrons.

Oxidation reaction is increasing of oxidation number of atom, because element lost electrons in chemical reaction.

Reduction is lowering oxidation number because atom gain electrons.

For example, in oxidation-reduction reaction: 2H₂ + O₂ → 2H₂O; hydrogen is oxidized (change oxidation number from 0 to +1) and oxygen i s reduced (change oxidation number from 0 to -2).

Hydrogen lost .four electrons anf oxygen gain four electrons
In redox reactions, there is no net loss or gain of electrons, so the answer is (1) equal to the total number of electrons gained

ovalent bonds are formed by which of the following? A. The energy transfer from one body to another B. The bonding of cations and anions C. Weak electrostatic attraction between charged areas of adjacent molecules D. The electrostatic attraction between oppositely charged ions E. The sharing of electrons between atoms

Answers

Answer:

E. THE SHARING OF ELECTRONS BETWEEN ATOMS

Explanation:

Covalent bonds are formed by sharing of electrons between the two reacting atoms so that a stable octet structure can be attained. The electron pair is called shared pair and each atom contributes an electron of the shared pair of electron.

Molecules are formed by covalent bonding and not ions. Examples of covalent bonds are hydrogen molecule (H2), Chlorine molecule (Cl2), water molecule (H2O).

Covalent compounds usually dissolve in non-polar solvents and not polar solvents (water), most covalent compounds do not conduct electricity.

Dative bonding is different from normal covalent bindings as the shared pair is donated by only one of the participating atom in coordinate covalent bonding.

To neutralize gastric juices in your stomach, antacids contain what

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Antacid contains weak acid neutralizing substances like calcium carbonate and aluminum hydroxide. These compounds are slow acting as result does not provide fast relief from hyperacidity due to excess acids in the stomach.

I need help with energy

Answers

Answer:

Explanation:

The correct answer is

energy resulting from the flow of charged particles , such as electrons or ions.

hope it helps :)

Which compound has the strongest hydrogen bonding between its molecules? 1. HBr 2. HF 3. HCl 4. HI

Answers

You can compare the strength of the hydrogen bonding by comparing the electronegativities of the other elements. All the four elements, Br, F, Cl and I belong to the same group in the periodic table: group 17 named halogens. Then the kind of bonding they form is similar: polar covalent. You must know the trend of the electronegativities in the periodic table. Electronegativity decrease when you down across a group. Then the electronegativity of F is the higher of the group (indeed, it is the highest of all the 118 elements) . The higher the electronegativity the stronger the attraction that the halogen attracts the electrons and the stronger the hydorgen bonding. Then, the conclusion is that HF has the strongest hydrogen bonding.
The correct answer is HF

How many grams are needed to form 33.6 L of carbon dioxide

Answers

It depends of the temperature and the pressure. If temperature and pressure are standard 1 mol forms 22.4 liter. So 33.6 liters form 33.6/22.4 = 1.5 mols.

Now calculate the molar mass of carbon dioxide: 12 g/mol + 2x16 g/mol = 44 g/mol

The mass of the 1.5 mols is 1.5mol * 44 g/mol = 66 g.
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