1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
OLga [1]
3 years ago
7

When the products of a reaction are hotter than the reactants: The reaction is exothermic. The reaction is endothermic. The reac

tants lost internal energy. The change in enthalpy is positive.
Chemistry
2 answers:
vodomira [7]3 years ago
6 0

Answer: Option (a) is the correct answer.

Explanation:

A chemical reaction in which energy is released is known as an exothermic reaction.

For example, A + B \rightarrow CD + Heat

In an exothermic reaction, energy of products is less than the energy of reactants. As heat is released that is why, formation of products become hotter.

On the other hand, a chemical reaction in which energy is absorbed by reactant molecules is known as an endothermic reaction.

For example, A + B + Heat \rightarrow CD

In an endothermic reaction, energy of products is more than the energy of reactants. As heat is absorbed, so formation of products become colder.

Thus, we can conclude that when the products of a reaction are hotter than the reactants the reaction is exothermic.

AlekseyPX3 years ago
3 0
<span>Exothermic reaction evolves energy due to which products get hot...</span>
You might be interested in
How many moles of mercury are equivalent to 3.46 x 1023 atoms?
olga55 [171]

Answer:

3.02 X1023 atoms Ag limol. - - 0.50 1 moles. 6.02241023 atoms.

4 0
2 years ago
Which list only includes terms that describe water?
Oxana [17]
D! It’s a pure substance and a compound
4 0
2 years ago
When is a covalent bond described as polar? Choose one: when electrons are transferred from one atom to another if covalently bo
melomori [17]

Answer:

if electrons are shared unequally between bonded atoms

Explanation:

A polar covalent bond is a bond that is formed due to the unequal distribution of electrons between two partially charged atoms. This is observed when the difference in electronegativity between the bond atoms is between 0.5 and 1.7.

A polar bond is a covalent bond between two atoms where the electrons that form the bond are unevenly distributed. This causes the molecule to have a slight electric dipole moment where one end is slightly positive and the other is slightly negative.

The charge of the electric dipoles is less than a full unit charge, so they are considered partial charges and are called delta plus (δ +) and delta minus (δ-).

Because positive and negative charges are separated at the bond, molecules with polar covalent bonds interact with the dipoles of other molecules. This produces intermolecular dipole-dipole forces between the molecules.

6 0
3 years ago
What happens when the vapor pressure of a liquid is equal to the external pressure? The liquid freezes The intermolecular forces
Makovka662 [10]

Answer:

The liquid boils.

Explanation:

Vapor pressure is simply defined as the pressure exerted on a substance (solid/liquid) by the vapor of the substance collected just at the top of the surface of the substance. In concise words, it is the pressure of Vapor that is in contact with its solid or liquid state.

For a liquid, it is the pressure of the Vapor gathering at the top of the surface of the liquid.

When this Vapor pressure matches the external pressure, the temperature stays constant and the molecules of the liquid all through the liquid can gain enough energy, rise to the surface of the liquid and break free in gaseous form; thereby, boiling.

The definition of boiling point basically explains that it is the point at which temperature stays constant, and the vapour pressure of the liquid matches the atmospheric/external pressure around the liquid and its liquid molecules change into vapor.

This is why liquids boil faster at higher altitudes; the atmospheric pressure at higher altitudes is reduced, hence, the temperature at which liquid boils at this high altitude is normally lower than its known boiling point temperature.

It is also why food cooks to a temperature higher than the boiling point of water in a pressure cooker/pot. The added pressure ensures that the cooking water boils at temperatures higher than its boiling point; thereby exposing the cooking ingredients to a higher temperature, leading to faster cooking.

Hence, it is obvious why boiling is the answer to this question.

6 0
2 years ago
An unsaturated solution has,
olganol [36]

Answer:

D... I think? Because it is unsaturated so there is more solute than solvent...

8 0
2 years ago
Read 2 more answers
Other questions:
  • Define monosaccharide disaccharide and polysaccharide give at least two examples of each. which of these is the
    13·1 answer
  • Complete this equation for the dissociation of na2co3(aq). omit water from the equation because it is understood to be present.
    15·2 answers
  • Jason combines the two intermediate steps shown.
    7·2 answers
  • Atoms of which element have the greatest tendency to gain electrons?
    6·2 answers
  • Which of the following compounds would have a low
    15·1 answer
  • When KNO3 dissolved in water, what is the intermolecular attraction between NO3 ions
    11·1 answer
  • ;_; help please i need help TwT
    12·2 answers
  • HELP BRAINLIEST
    13·1 answer
  • What kind of information does the activity series of metals give us?
    5·2 answers
  • Is water the only liquid? If not, name 5 more
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!