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
zhenek [66]
3 years ago
5

which quantity will always have a negative value? A) the total bond energy of the reactants in an endothermic reaction. B) the c

hange in energy in a system during an endothermic reaction. C) the change in energy in a system during an exothermic reaction. D) the total bond energy of the products during an exothermic reaction
Chemistry
2 answers:
Andre45 [30]3 years ago
8 0

Considering the definition of enthalpy of a hemical reaction and endothermic and exothermic reaction, the correct answer is option C: the change in energy in a system during an exothermic reaction.

The enthalpy of a chemical reaction as the heat absorbed or released in a chemical reaction when it occurs at constant pressure. That is, the heat of reaction is the energy that is released or absorbed when chemicals are transformed into a chemical reaction.

The enthalpy is an extensive property, that is, it depends on the amount of matter present.

On the other side, an endothermic reaction requires energy while an exothermic reaction releases energy.

In other words, a chemical reaction is endothermic when it absorbs energy from the environment. In this case, the heat is transferred from the outside to the inside of the system.

On the other hand, an exothermic reaction is one where energy flows out of the system. This energy is released in the form of heat.

So, if the enthalpy of reaction is negative, it means that during the course of the reaction, the system loses or releases heat to the environment and is exothermic, while if the enthalpy of reaction is positive, it means that during the course of the reaction, the system absorbs heat from the environment and is endothermic.

So, the correct answer is option C: the change in energy in a system during an exothermic reaction.

Learn more:

  • brainly.com/question/24266321?referrer=searchResults
  • brainly.com/question/13885179?referrer=searchResults
Reptile [31]3 years ago
8 0

The Reaction System Quick Check

1. D) the change in energy in a system during an exothermic reaction

2. D) In the air, only the oxygen is part of the system.

3. D) This is an endothermic reaction because the system took energy from the surroundings.

4. B) Energy is released by the formation of chemical bonds, and energy is absorbed when the bonds are broken

5. B) the jar

the answers change places so be careful

You might be interested in
WHat do particles move in a solid by?
DIA [1.3K]
If you mean what I said , the particles in a solid vibrate in place.
6 0
3 years ago
Read 2 more answers
Can someone answer these for me I’ll mark you brainliset or whatever it’s called lol I rlly need to get these right
aleksandrvk [35]
Gg rjhrrjfnrjrkrkrkrjjtjrrkrktotofofovkfjiffiifi
7 0
3 years ago
Are the strengths of the interactions between the particles in the solute and between the particles in the solvent before the so
Colt1911 [192]

Answer:

Less than

Explanation:

The process of dissolution occurs as a kind of "tug of war". On one side are the solute-solute and solvent-solvent interaction forces, while on the other side are the solute-solvent forces.

Only when the solute-solvent forces are strong enough to overcome the pre-mixing forces do they overcome the "tug of war", and thus dissolution occurs.

Thus, it is concluded that the interaction forces between solute particles and solvent particles before they are combined are less than the interaction forces after dissolution.

5 0
3 years ago
A graduated cylinder is filled with 54.32 cm3 of water. An irregular solid made of iron is carefully placed into the graduated c
NeTakaya

Answer:

<h3>The answer is 26.22 g</h3>

Explanation:

The mass of a substance when given the density and volume can be found by using the formula

<h3>mass = Density × volume</h3>

From the question

density of iron = 7.874 g/cm³

volume = final volume of water - initial volume of water

volume = 57.65 - 54.32 = 3.33 mL

We have

mass = 7.874 × 3.33 = 26.22042

We have the final answer as

<h3>26.22 g</h3>

Hope this helps you

3 0
3 years ago
Chemical weathering change the ___ of rock​
a_sh-v [17]

Answer:

Chemical weathering is the process by which rocks are broken down by chemical reaction.

Explanation:

Chemical weathering is the weakening and subsequent disintegration of rock by chemical reactions. These reactions include oxidation, hydrolysis, and carbonation. These processes either form or destroy minerals, thus altering the nature of the rock's mineral composition.

5 0
3 years ago
Other questions:
  • A certain skin lotion is a fine mixture of water and various oils. This lotion is cloudy and cannot be separated into oil and wa
    12·1 answer
  • What is the environmental impact natural polymers have made?
    15·1 answer
  • Materials of low mass are combined to form a substance of higher mass during ____. a. fission c. both A and B b. fusion d. neith
    14·1 answer
  • Whag is the chemical formula of carbon tarta chlorine​
    15·1 answer
  • If there is 15.00 grams of magnesium in the reaction what quantity of sodium will be produced
    9·1 answer
  • sketch and label a helium-4 atom and helium-5 atom to include the protons, neutrons, and electrons. how are they alike and how a
    10·2 answers
  • A transverse wave is observed to be moving along a lengthy rope. Adjacent crests are positioned 2.4 m apart. Exactly six crests
    11·1 answer
  • If there are 12 people, and each person has 4 coins, there are ____ times as many coins as people.
    11·1 answer
  • Which of these compounds would most likely be found in a deposit of natural gas?
    6·1 answer
  • Which phase has the lowest entropy?<br> O A. Aqueous<br> O B. Liquid<br> O C. Solid<br> O D. Gas
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!