Consider the following generic chemical equation:A + B → C + D

Reactant A contains 85.1 J of chemical energy. Reactant B contains 87.9 J of chemical energy. Product C contains 38.7 J of chemical energy. If the reaction absorbs 104.3 J of chemical energy as it proceeds, how much chemical energy must product D contain? Explain your answer.

Answers

Answer 1

Answer:

Answer: 238.6 J

Explanation:

According to the law of conservation of energy, energy can neither be created nor be destroyed. It can only be transformed from one form to another.

Endothermic reactions are those in which heat is absorbed by the system and thus the energy of products is higher than the energy of reactants.

For the given reaction:

$A+B+energy\rightarrow C+D$

Energy of A = 85.1 J

Energy of B = 87.9 J

Energy on reactant side = Energy of A + Energy of B + Energy absorbed 85.1 + 87.9 + 104.3 = 277.3 J

Energy on reactant side = Energy on product side = 277.3 J

Energy on product side = Energy of C + Energy of D

277.3 J = 38.7 J + Energy of D

Energy of D = 238.6 J

Thus chemical energy product D must contain is 238.6 J

Answer 2

Answer:

The law of conservation of energy states that energy is not created or destroyed during chemical reactions. The total amount of energy in the reactants, plus the energy absorbed during the reaction, must be equal to the total energy of the products.

Product D contains (85.1 J + 87.9 J + 104.3 J) – 38.7 J = 238.6 J of chemical energy.

Related Questions

What is the name for the compound S3N2
An unstable nucleus loses the most mass if the nucleus emits(1) an alpha particle (3) a positron (2) a beta particle (4) a gamma ray
what trend in the periodic table should be expected as the atomic number of the halogens increase from fluorine to iodine
Iron(III) oxide + carbon yields carbon monoxide and iron (write the correct formulas and then balance)
Which sample of matter is a mixture? (1) Br2(ℓ) (3) KBr(s) (2) K(s) (4) KBr(aq)

What is the percent by mass of carbon in C10 H14 N2?

Answers

Answer: The percentage by mass of carbon in the given compound is 45.8 %

Explanation:

We are given a chemical compound having chemical formula $C_(10)H_(14)N_2$

To calculate the percentage composition of an element in a compound, we use the equation:

$\%\text{ composition}=\frac{\text{Mass of carbon element}}{\text{Mass of compound}}* 100$

In 1 mole of given compound, 10 moles of carbon atoms are there.

Mass of $C_(10)H_(14)N_2= [(10* 12)+(14 * 1)+(2* 14)]=262g/mol$

Mass of carbon element = $[10* 12]=120g/mol$

Putting values in above equation, we get:

$\%\text{ composition of carbon}=(120)/(262)* 100=45.8\%$

Hence, percentage of carbon in given compound is 45.8 %.

Multiply the number of each element by its mass on the periodic table.

Add them together.

Put the mass of carbon only over the total mass and multiply the result by 100 to get the percentage.

The elements of ________ are: 1) the felonious taking of personal property, 2) from the person or immediate presence of another, 3) against the will of the victim, and 4) accomplished by means of force or by putting the victim in fear.

Answers

Answer:

robbery

Explanation:

The elements of robbery are 1) the felonious taking of personal property, 2) from the person or immediate presence of another, 3) against the will of the victim, and 4) accomplished by means of force or by putting the victim in fear.

Action of taking property by unlawfully from a person or place by force or threat of force is called robbery and all above condition satisfies the term robbery hence robbery is correct match.

Which best describes the oxidizing agent in this reaction? Cl2(aq) + 2Brmc003-1.jpg(aq) mc003-2.jpg 2Clmc003-3.jpg(aq) + Br2(aq)

Answers

The balanced chemical equation is this:
Cl2(aq) + 2Br-(aq) --> 2Cl- + Br2(aq)

Looking at each substance involved in the reaction:
Cl2 has 0 charge and gains a charge of -1 after the reaction
Br- has a charge of -1 but turns to 0 after the reaction

Cl2 gained an electron which means it is the reduced substance
Br- lost an electron which means it is the oxidized substanced
Consequently, Cl2 is the oxidizing agent and Br- is the reducing agent.

Answer:

Bromine (Br) loses an electron, so it is the reducing agent.

Explanation:

EDG20

What physical state of matter is associated with the strongest attractive forces between particles (molecules, ions, or atoms)?

Answers

The answer is solid.

Solid, physical state of matter is associated with the strongest attractive forces between particles (molecules, ions, or atoms).

Among the other states of matter that is liquid, gas; solid is the one that is having strongest attractive forces between particles (molecules, ions, or atoms).

This is an interaction in which two waves meet, matching crest to crest and trough to trough. The resultant wave will have an amplitude of the sum of the two.

Answers

I'm Osei George the answer is interference

Answer:deferehug

Explanation:

What is a chemical bond

Answers

an attraction between atoms that allows the formation of chemical substances that contain two or more atoms.

Answer: An intramolecular force holding 2 atoms together

Explanation:

C apex approved

Other Questions

A chemical reaction is at equilibrium. Compared to the rate of the forward reaction, the rate of the reverse reaction is(1) faster and more reactant is produced(2) faster and more product is produced(3) the same and the reaction has stopped(4) the same and the reaction continues in both directions

What is happening in this picture? Look at the food colouring and explain using the following terms: solute, solvent, dissolving, homogenous.

A sample of Ca(OH)2 is considered to be an Arrhenius base because it dissolves in water to yieldA. Ca2+ ions as the only positive ions in solution B. H3O+ ions as the only positive ions in solution C. OH– ions as the only negative ions in solution D. H– ions as the only negative ions in solution

Chemical changes ________ involve the breaking and making of chemical bonds.A) AlwaysB) NeverC) SometimesFill in the blank