11. If we are looking to find alternative fuel sources, what are some criteria they should meet to power the engines we currently use? 12. What do we need to investigate next to help us understand what might meet these criteria?
Thermochemistry
Thermochemistry can be considered as a branch of thermodynamics that deals with the connections between warmth, work, and various types of energy, formed because of different synthetic and actual cycles. Thermochemistry describes the energy changes that occur as a result of reactions or chemical changes in a substance.
Exergonic Reaction
The term exergonic is derived from the Greek word in which ‘ergon’ means work and exergonic means ‘work outside’. Exergonic reactions releases work energy. Exergonic reactions are different from exothermic reactions, the one that releases only heat energy during the course of the reaction. So, exothermic reaction is one type of exergonic reaction. Exergonic reaction releases work energy in different forms like heat, light or sound. For example, a glow stick releases light making that an exergonic reaction and not an exothermic reaction since no heat is released. Even endothermic reactions at very high temperature are exergonic.
![Answer Questions 11 & 12
So what was your original purpose for investigating these fuels?
What have you learned so far about chemical reactions to help you know what to look for in an
alternative fuel source?
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What did you learn about burning that will help you understand what needs to be in a potential
alternative fuel?
What is different about how the matter rearranges between these two kinds of reactions that
might help you explain the changes we see in energy?
Can you predict whether a reaction will transfer energy OUTor IN?
Do our current models explain what is going on with particles and how they are re-arranging to
help you explain the changes we see in energy?
What does our model need to have to help you understand this better?
What do you know about the individual atoms that make up molecules?
There ore o lot of issues with using fossil fuels so we wanted to try to figure outf there is onything else we
might be oble to use
We learned that burning is a chemical reoction thot powers on engine becouse a lot of energy is releosed, and
the temperoture change powers o piston which can make the rest of the car move
We would like to find a reaction that doesn't result in adding more CO, to the otmosphere
When the motter rearranges, sometimes energy is released to the environment and sometimes energy is
transferred to the porticles from the environment.
Our current models can't reolly exploin or predict f energy will be transferred to or from the surroundings
Our current models show us that the otons rearronge during a chemicol reoction to make new substonces,
but the models don't exploin how or why the arrange the woy they do
We should find a way to model this so we can understond how these atoms end up in the arrangements they
are in and if thor hos onything to do with how the energy is tronsferred
->
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11. If we are looking to find alternative fuel sources, what are some criteria they should meet
to power the engines we currently use?
12. What do we need to investigate next to help us understand what might meet these
criteria?](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F6a885195-c392-4d8a-9e0c-710f0dd0f9b7%2F06f20d49-f016-40b2-b628-e622ef4dbd86%2Fk34eveq_processed.jpeg&w=3840&q=75)
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Criterion for alternate fuels:-
1. They should be cleaner, i.e. the end products of the Comustion should be not harmful for the environment. For. example, the Hydrogen engine gives water as exhaust which has no environmental issues.
2. Efficiency should be good.
3. Should be abundant in availability.
4. Cost should be affordable
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