Energy is neither created nor destroyed in a chemical reactions.

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Energy in chemical reactions is conserved, meaning it is neither created nor destroyed. The energy released during these reactions originates from the breaking and reforming of atomic bonds. In the combustion example of 2 H2 + O2 -> H2O, the transformation of hydrogen and oxygen bonds into water releases energy. This process is crucial for applications like propelling the space shuttle into orbit. Understanding the source of this energy is fundamental to the principles of chemistry and thermodynamics.
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Energy is neither created nor destroyed in a chemical reactions. Explain where the energy released by the reactions comes from.
 
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Chemical energy exists in the bonds between atoms.

For example, consider a chemical reaction 2 H2 + O2 -> H2O. The bonds of H and O molecules break and reform to H-O bonds, and energy is released. This is an example of combustion - and this reaction is responsible for propelling the space shuttle into orbit.
 
Thread 'Confusion regarding a chemical kinetics problem'

Thread 'Confusion regarding a chemical kinetics problem'

TL;DR Summary: cannot find out error in solution proposed. [![question with rate laws][1]][1] Now the rate law for the reaction (i.e reaction rate) can be written as: $$ R= k[N_2O_5] $$ my main question is, WHAT is this reaction equal to? what I mean here is, whether $$k[N_2O_5]= -d[N_2O_5]/dt$$ or is it $$k[N_2O_5]= -1/2 \frac{d}{dt} [N_2O_5] $$ ? The latter seems to be more apt, as the reaction rate must be -1/2 (disappearance rate of N2O5), which adheres to the stoichiometry of the...
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Thread 'Prove that evolution is constant (Provide at least two arguments to support your position)'

I don't get how to argue it. i can prove: evolution is the ability to adapt, whether it's progression or regression from some point of view, so if evolution is not constant then animal generations couldn`t stay alive for a big amount of time because when climate is changing this generations die. but they dont. so evolution is constant. but its not an argument, right? how to fing arguments when i only prove it.. analytically, i guess it called that (this is indirectly related to biology, im...
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