As we know that the bonds are formed and breaks during the chemical reaction. Some energy is released or absorbed when the bonds are formed and breaks during the chemical reaction.

During the bond breaking, some energy is required to break the bonds.

During the bond formation, some energy is released to the formation of the bonds.

In the given reaction, the bond between the hydrogen-hydrogen in $H_2$ are breaking into two hydrogen. That means during the bond breaking, some energy is required or absorbed to break the bonds.

Hence, the correct option is, (2) Energy is absorbed as bonds are broken.

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2 years ago

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Which image displays a chemical property about a substance? Choose all that apply

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Answer:

Answer: II and IV

Explanation: Flammability and the ability to rust are chemical properties because they change an object. I, III, and V are physical properties because it doesn't change the object's composition. This includes weight, the change in matter (solid to liquid), or change in volume.

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Explanation:

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One gallon of pure isooctane is about 230 moles. How many moles of O2 would be required to completely combust one gallon of isoo

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Answer:

Explanation:

Hello,

At first, consider the balanced reaction for the combustion of the isooctane:

$C_8H_{18}+\frac{25}{2} O_2-->8CO_2+9H_2O$