What happens when 2 oxygen atoms combine to form a molecule of oxygen?

Explanation: A single oxygen molecule’s formula is O2 . This means that two oxygen molecules will combine to form a diatomic molecule. Oxygen has two valent electrons, so when two oxygen atoms come together they will form a double bond.

Is energy released or absorbed to break the bonds in the oxygen molecules to form oxygen atoms?

These stable molecules have a much larger bond energies holding them together. In chemical reactions is it easy to get molecular hydrogen to react with molecular oxygen (both molecules held together with lower energy covalent bonds) – all it takes is a spark to get it going!…

How much energy is released when hydrogen combines with oxygen?

When one mole of hydrogen molecules (two grams) combines with half a mole of oxygen molecules (16 grams) to form one mole of water molecules (18 grams), the energy given off turns out to be 242,000 joules, assuming that the water comes out as a gas rather than as a liquid.

What type of energy change occurs when atoms combine to form a molecule?

Explanation: When two atoms tend to chemically combine with each other then during this association some amount of energy is evolved and this energy is known as bond formation energy or bond energy.

What bond is oxygen held together by?

covalent bonds
A: The two oxygen atoms share two pairs of electrons, so two covalent bonds hold the oxygen molecule together.

How are the atoms in an oxygen molecule joined together?

COVALENT BONDS When two oxygen atoms bond together to form an oxygen molecule, they share four electrons? two from each oxygen atom. Other examples of covalent bonding are water (H2O), and carbon dioxide (CO2). Covalent compounds are usually liquids or gases with low melting points.

When bonds are formed energy is released or absorbed?

Breaking and making bonds Energy is absorbed to break bonds. Bond-breaking is an endothermic process. Energy is released when new bonds form. Bond-making is an exothermic process.

Why energy is released when bonds are formed?

When two objects are attracted to each other, they lose potential energy as they move closer together. The lost energy is available to be “released” in another form. So that is the basic answer: creating bonds releases energy because the two atoms in a bond are attracted to each other.

Do molecules combine to form atoms?

Covalent bonds and molecules When atoms combine by forming covalent bonds, the resulting collection of atoms is called a molecule. We can therefore say that a molecule is the simplest unit of a covalent compound.

What happens when hydrogen molecules react with oxygen?

Hydrogen molecules violently react with oxygen when the existing molecular bonds break and new bonds are formed between oxygen and hydrogen atoms. As the products of the reaction are at a lower energy level than the reactants, the result is an explosive release of energy and the production of water. Sciencing_Icons_Science

What is the activation energy of hydrogen and oxygen?

Activation Energy. If collision energies reach a minimum activation energy sufficient to “break” the bonds between the reactants, then a reaction between hydrogen and oxygen follows. Because hydrogen has a low activation energy only a small spark is needed to trigger a reaction with oxygen.

What is the net release of energy from the reaction?

This results in the net release of energy from the reaction, and this is known as an exothermic reaction. After one set of hydrogen and oxygen molecules have reacted, the energy released triggers molecules in the surrounding mixture to react, releasing more energy.

How many electrons do hydrogen and oxygen have in a molecule?

Hydrogen atoms have one electron each. They combine into molecules of two so that they can share two electrons (one each). This is because the inner-most electron shell is at a lower energy state (and therefore more stable) when occupied by two electrons. Oxygen atoms have eight electrons each.